Cheer pilot flying aircraft (10)
I believe the answer is:
helicopter
'aircraft' is the definition.
(helicopter is a kind of aircraft)
'cheer pilot flying' is the wordplay.
'flying' is an anagram indicator (letters fly around into new positions).
'cheer'+'pilot'='cheerpilot'
'cheerpilot' is an anagram of 'HELICOPTER'.
(Other definitions for helicopter that I've seen before include "aircraft" , "Rotary-winged craft" , "Chopper" , "This can be used to transport" , "Rotorcraft" .)