I'm trying to understand an answer to a cryptic crossword that I've been trying to solve.  The clue is:

"Aircraft whirling, cheer pilot! (10)"

and apparently, the answer is "helicopter".

Could you explain this answer for me please?
Yes sure, 'aircraft whirling' can refer to either a helicopter or a plane. In this case it seems like the person who wrote the clue meant a helicopter and so we get 'helicopter'.