What predators do in the Catskills (4)

I believe the answer is:

kill

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'what predators do' is the definition.
The definition suggests a singular noun which matches the answer.

'in the catskills' is the wordplay.
'in' says the answer is hidden in the clue.
'KILL' is hidden within 'catskills'.

Can you help me to learn more?

(Other definitions for kill that I've seen before include "Blue-violet colour" , "Put an end to" , "Prey" , "Slay" , "Deprive of life" .)

I've seen this clue in the Evening Standard.

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