Spot, we hear, to find fish (6)
I believe the answer is:
plaice
'fish' is the definition.
(plaice is a kind of fish)
'spot we hear' is the wordplay.
'spot' becomes 'place' (synonyms).
'we hear' indicates a 'sounds like' (homophone) clue.
'place' sounds like 'PLAICE'.
'to find' is the link.
(Other definitions for plaice that I've seen before include "Large flat fish" , "Edible flatfish" , "Brown flatfish" , "N. Atlantic flatfish" , "Tasty flatfish I place here" .)