Criminal gets keys bent (7)

I believe the answer is:

crooked

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'bent' is the definition.
(similar in meaning)

'criminal gets keys' is the wordplay.
'criminal' becomes 'crook' (synonyms).
'gets keys' becomes 'ed' (I can't justify this - if you can you should believe this answer much more).
'crook'+'ed'='CROOKED'

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(Other definitions for crooked that I've seen before include "Warped" , "Misshapen" , "Awry - untrustworthy" , "Bent, twisted" , "Bent; dishonest" .)

I've seen this clue in The Daily Express.

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