Home mostly lacking interest, say - brought over drink? (7)
I believe the answer is:
indulge
'drink?' is the definition.
(thesaurus)
'home mostly lacking interest say brought over' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'mostly' means to remove the last letter.
'lacking interest' becomes 'dull' (I've seen this before).
'say' becomes 'eg'.
'brought over' shows that the letters should be reversed in order.
'eg' in reverse letter order is 'ge'.
'dull' with its last letter removed is 'dul'.
'in'+'dul'+'ge'='INDULGE'
(Other definitions for indulge that I've seen before include "Gratify a wish" , "Mollycoddle -- eluding (anag)" , "Spoil - oneself, maybe" , "Satisfy (a desire)" , "Yield to the wishes of" .)