He's a bit decadent (3)

I believe the answer is:

cad

'he's' is the definition.

'a bit decadent' is the wordplay.
'a bit' indicates a hidden word (the answer is formed by a bit of the clue).
'CAD' is hidden within 'decadent'.

(Other definitions for cad that I've seen before include "Rogue" , "One behaves dishonourably" , "Ungentlemanly person" , "Heel" , "An Englishman who behaves dishonourably, a rotter" .)

I've seen this clue in the Evening Standard.

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