Crossword Genius

Catches an unwary sprat? (5)

Ross

I believe the answer is:

traps

I'm a little stuck... Click here to teach me more about this clue!

'catches' is the definition.
(trapping is a kind of catching)

'an unwary sprat?' is the wordplay.
'sprat' anagrams to 'TRAPS'.
Though, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for traps that I've seen before include "Pony carts; ensnares" , "Toils" , "gins" , "Ambushes" , "Corners" .)

I've seen this clue in the Evening Standard.
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