Intricate traps for fish (5)
I believe the answer is:
sprat
'fish' is the definition.
(sprat is a kind of fish)
'intricate traps' is the wordplay.
'intricate' indicates anagramming the letters.
'traps' anagrammed gives 'SPRAT'.
'for' acts as a link.
(Other definitions for sprat that I've seen before include "Small fish, sardine, say" , "It's set to catch a mackerel" , "'Set a . . . . . to catch a herring'" , "one on a fat-free diet" , "'Set a . . . . . to catch a whale'" .)