Pilot’s rifle? (4-5)
I believe the answer is:
high-flier
This clue could be a double definition.
'pilot's' is the first definition.
(I've seen this before)
'rifle?' is the second definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for high-flier that I've seen before include "Successful person (in an aeroplane?)" , "Successful type" .)