Reported locality of fish (6)
I believe the answer is:
plaice
'fish' is the definition.
(I know that plaice is a type of fish)
'reported locality' is the wordplay.
'reported' indicates a 'sounds like' (homophone) clue.
'locality' becomes 'place' (place is a kind of locality).
'place' sounds like 'PLAICE'.
'of' acts as a link.
(Other definitions for plaice that I've seen before include "The fish sounds as if it hits the spot" , "Important food fish" , "Position the fish, we hear" , "Large flat fish" , "Ice, pal, will catch this fish" .)