Breast lift husband is wanting for Communist sympathiser (7)

'for communist sympathiser' is the definition.
(supporter of Josip Tito of Yugoslavia)

'breast lift husband is' is the wordplay.
I cannot quite understand how this works, but
'breast' could be 'tit' (informal term for a breast) and 'tit' is found in the answer.
'is' is found in the answer.
The remaining letters 'ot' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'wanting' acts as a link.