C1 [C usually singular] the ​pedal or ​handle in a ​vehicle that is used to ​operate the engine's clutch: Push the clutch in, put the ​car into ​gear, ​rev the ​engine, and then ​gently ​let the clutch out.
http://dictionary.cambridge.org/dictionary/english/clutch
clutch verb [I/T] (HOLD). › to ​hold or ​try to ​hold something ​tightly, often because of a ​state of ​fear or ​anxiety: [T] The preschooler clutched his ​mother ​tightly.
http://dictionary.cambridge.org/dictionary/english/clutch
3. The clutch disc. Between the flywheel and the pressure plate is the clutch disc. The clutch disc has friction surfaces similar to a brake pad on both sides that make or break contact with the metal flywheel and pressure plate surfaces, allowing for smooth engagement and disengagement. 4. and 5.
https://mobiloil.com/en/article/car-maintenance/car-maintenance-archive/how-does-a-car-clutch-work
clutch verb [I or T]. C2 to take or ​try to take ​hold of something ​tightly, usually in ​fear, ​worry, or ​pain: Silent and ​pale, she clutched (onto) her mother's ​hand. Clutching the ​money to his ​chest, he ​hurried to the ​bank. He ​collapsed, clutching his ​stomach.
http://dictionary.cambridge.org/dictionary/english/clutch
As part of our occasional series on idioms used in or in relation to business, we look today at the important area of making projects happen – getting projects started, making progress with those projects and, as sometimes happens, failing to make progress.
http://dictionary.cambridge.org/dictionary/english/clutch
clutch noun (GROUP). › /klʌtʃ/ [C] a ​group of ​eggs or ​young ​animals ​hatched from ​eggs: several clutches of the ​infant ​sea ​turtles › /klʌtʃ/ [C] A clutch is also a ​group of ​people, ​animals, or things: The herders ​tend to ​small clutches of ​cattle and ​llamas.
http://dictionary.cambridge.org/dictionary/english/clutch
As you let the clutch pedal out, the friction surfaces on both sides of the clutch disc begin to make contact with the metal surfaces of the flywheel and pressure plate, and the power of the engine is transferred through the transmission input shaft, through the gears and right down onto the road.
https://mobiloil.com/en/article/car-maintenance/car-maintenance-archive/how-does-a-car-clutch-work
The clutch pressure plate. Bolted to the clutch flywheel is the second major component: the clutch pressure plate. The spring-loaded pressure plate has two jobs: to hold the clutch assembly together and to release tension that allows the assembly to rotate freely. 3.
https://mobiloil.com/en/article/car-maintenance/car-maintenance-archive/how-does-a-car-clutch-work
Rod-and-lever linkage adjustment A rod-and-lever linkage is a series of links, levers, androds connecting the clutch pedal to the clutch fork.Adjustment is usually provided by a threaded rod thatpasses through a pivot block, Figure 7-6 and Figure 7-7.
http://www.g-w.com/pdf/sampchap/9781605252131_ch07.pdf
Install the clutch disc and pressure plate assemblyonto the flywheel. If one side of the disc is markedflywheel, place that side against the flywheel. If notmarked, study the disc, flywheel, and assembly todetermine which way the long side of the hub shouldfit into the assembled clutch.
http://www.g-w.com/pdf/sampchap/9781605252131_ch07.pdf
what part of the vehicle is the clutch
A clutch is a part between the flywheel and the pressure plate.