Officer relieving the co-pilot of toil, possibly? (3)
I believe the answer is:
cop
'officer' is the definition.
(cop is a kind of officer)
'relieving the co-pilot of toil possibly?' is the wordplay.
I cannot quite see how this works, but
'co' is within the answer.
A single letter 'p' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for cop that I've seen before include "Policeman (colloq.)" , "Short policeman" , "catch" , "Policeman (sl)" , "Police officer (informal)" .)