Crossword Genius

Vermin control that’s screwed some rat up? (9)

Ross

I believe the answer is:

mousetrap

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

'vermin control' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'screwed some rat up?' is the wordplay.
'screwed' indicates an anagram.
'some'+'rat'+'up'='someratup'
'someratup' is an anagram of 'MOUSETRAP'.

'that's' is the link.

Can you help me to learn more?

(Other definitions for mousetrap that I've seen before include "Cheap cheese" , "Snare for vermin" , "For instance, old Cheshire" , "Poor (cheese); route maps (anag.)" , "A rodent control; (The) long-running play" .)

I've seen this clue in The Independent.
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