Having a shy at them may be fair game (8)
I believe the answer is:
coconuts
'having a shy at them may be fair' is the definition.
I can't judge whether this definition defines the answer.
'game' is the wordplay.
I cannot really understand how this works, but
'game' could be 'on' (both can mean willing) and 'on' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for coconuts that I've seen before include "No Cos cut up to get these large husks with white meat and milk" , "Large oval nuts with fibrous husks" , "Large oval nuts with fibous husks" , "Fruits of a tropical palm tree" , "Large, hard-shelled oval husks" .)