Remember to catch fish (5)
I believe the answer is:
place
'remember' is the definition.
(I've seen this in another clue)
'catch fish' is the wordplay.
'catch' indicates a 'sounds like' (homophone) clue (catch can mean hear).
'fish' becomes 'plaice' (plaice is a kind of fish).
'plaice' is a homophone of 'PLACE'.
'to' acts as a link.
(Other definitions for place that I've seen before include "Identify -- station" , "Locus" , "Site" , "square?" , "Venue" .)