Catches an unwary sprat? (5)
I believe the answer is:
traps
'catches' is the definition.
(trapping is a kind of catching)
'unwary sprat?' is the wordplay.
'sprat' anagrams to 'TRAPS'.
Though, I'm unsure how the anagram is indicated.
'an' acts as a link.
Can you help me to learn more?
(Other definitions for traps that I've seen before include "Pony carts; ensnares" , "Toils" , "gins" , "Ambushes" , "Corners" .)