Vermin control that’s screwed some rat up? (9)
I believe the answer is:
mousetrap
'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" .)