Sweet love in grey consumed by drink (8)
I believe the answer is:
adorable
'sweet' is the definition.
(I've seen this before)
'love in grey consumed by drink' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'in' indicates putting letters inside.
'grey' becomes 'drab'.
'consumed by' means one lot of letters goes inside another.
'drink' becomes 'ale' (ale is a kind of drink).
'o' inserted within 'drab' is 'dorab'.
'dorab' placed within 'ale' is 'ADORABLE'.
(Other definitions for adorable that I've seen before include "Evoking love and admiration" , "Inspiring great affection" , "Very charming and attractive" , "Broad lea (anag.)" , "Such as excites loving admiration" .)