Why does a force on a propeller act 90° "ahead" due to gyroscopic precession? This is a common explanation:

A tailwheel airplane is on the takeoff roll and the tail comes up, the
propeller disc rotates forward. That's akin to someone pushing on the
top of the disc. The force results 90 degrees ahead, or on the right
side, pushing the nose left.

I do not understand the term &quot;90 degrees ahead&quot;.
In my mind, in this example, we are viewing the propeller spinning clockwise.  If a force is applied at the top (12 oclock), then the resulting gyroscopic force on the right (3 oclock) should be called 90 degrees after.  If the force is applied at 12 oclock, spines 90 degrees and then a resulting force at 3 oclock, why is that called before instead of after?
If I say &quot;my brother was born ahead of me&quot;, you might reasonably assume that my brother is older than me.  That his birth took place at an earlier point in time.
You seem to be assuming that &quot;ahead&quot; refers to the position that any given blade of the propeller occupied at an earlier point of time.  I.e., a position displaced opposite to the direction that the propeller is rotating.
But if you are driving a car and your passenger says &quot;the light's green, go ahead&quot;, would you take that a suggestion to go backwards?  Or to go forwards?
The meaning of &quot;ahead&quot; in the passage quoted in the original question is correct and reasonably unambiguous-- it means forwards along the direction that the propeller is rotating.
Note that the original passage did not contain the word &quot;before&quot;.