Indulge oneself? Wife needs to approve (6)
I believe the answer is:
wallow
'indulge' is the definition.
(I've seen this before)
'wife needs to approve' is the wordplay.
'wife' becomes 'w'.
'needs' is a charade indicator (letters next to each other).
'to approve' becomes 'allow' (I can't explain this - if you can you should believe this answer much more).
'w'+'allow'='WALLOW'
'oneself?' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for wallow that I've seen before include "Roll around as in mud" , "Luxuriate (in mud, muck)" , "Roll about as in water or mud" , "Lie about in mud or water" , "Indulge excessively, in self-pity perhaps" .)