They employ devious ruses (5)

I believe the answer is:

users

'they employ' is the definition.
(I've seen this before)

'devious ruses' is the wordplay.
'devious' indicates an anagram.
'ruses' with letters rearranged gives 'USERS'.

(Other definitions for users that I've seen before include "They employ" , "Utilisers" , "Ruses for employers" , "Operators" , "People with a drug habit" .)

I've seen this clue in The Globe and Mail.

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