Bite from insect that's repelled (4)
I believe the answer is:
tang
'bite' is the definition.
(both can mean a flavour or taste)
'insect that's repelled' is the wordplay.
'insect' becomes 'gnat' (gnat is a kind of insect).
'that's repelled' shows that the letters should be reversed in order.
'gnat' reversed gives 'TANG'.
'from' acts as a link.
(Other definitions for tang that I've seen before include "Sharpness" , "Strong smell of gnat" , "Savour" , "Strong taste or smell" , "Strong, pungent taste" .)