Wind-player’s a fool, opening gift (7)
I believe the answer is:
bassoon
'wind' is the definition.
(bassoon is a kind of wind)
'fool opening gift' is the wordplay.
'fool' becomes 'ass' (both can mean a stupid person).
'opening' indicates putting letters inside (some letters open a gap in others).
'gift' becomes 'boon' (I've seen this in another clue).
'ass' inserted into 'boon' is 'BASSOON'.
'player's a' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for bassoon that I've seen before include "So-so ban on the instruments" , "It is played" , "wind player" , "Instrument - no ASBOs (anag)" , "No, a boss would be a musical instrument" .)