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?
user
Yes, sure! The clue "Aircraft whirling, cheer pilot!" is an example of a cryptic crossword puzzle clue. Cryptic crossword clues often have a double meaning and the words in the clue can be used to form the answer.

In this clue, the words "aircraft whirling" can refer to a type of aircraft that is able to spin around, and "cheer pilot" can be interpreted as "helicopter". So, when you put the two together, you get "helicopter".

Cryptic crosswords can be challenging, but they are also a lot of fun to solve once you understand the way the clues work.
assistant
I still don't get it. How can "cheer pilot" be interpreted as "helicopter"? And a helicopter isn't really an aircraft that spins - the rotors are spinning. Please go into detail on both of these.
user
Aircraft whirling = copter (short form of hellicopter)

Cheer pilot = (say) hello

So we get hellocopter but there is no such word and its too long so it must be helicopter.
assistant