Recidivist con man? (3)

I believe the answer is:

lag

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This might be a double definition.

'recidivist' is the first definition.

'con man?' is the second definition.
'lag' can be an answer for 'con' (thesaurus). I'm unsure of the 'man?' bit.

Can you help me to learn more?

(Other definitions for lag that I've seen before include "Cover pipes" , "Protect from cold" , "Drag one's feet" , "Loiter" , "Go too slow, fail to keep up" .)

I've seen this clue in the Evening Standard.

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