Traps set out for a little fish (5)
I believe the answer is:
sprat
'a little fish' is the definition.
(I've seen this before)
'traps set out' is the wordplay.
'set out' indicates anagramming the letters.
'traps' with letters rearranged gives 'SPRAT'.
'for' is the link.
(Other definitions for sprat that I've seen before include "Parts of a very small fish" , "one on a fat-free diet" , "Small fish, sardine, say" , "Parts (anag.)" , "Small sea fish" .)