Indulges -- if wife gives permission! (7)

I believe the answer is:

wallows

'indulges' is the definition.
(wallow can mean to indulge in something)

'wife gives permission' is the wordplay.
'wife' becomes 'w' (abbreviation).
'gives permission' becomes 'allows' (I've seen this before).
'w'+'allows'='WALLOWS'

'if' is the link.

(Another definition for wallows that I've seen is " Rolls in water like swallow".)

I've seen this clue in The Telegraph.

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