Some regrets in absorbing strong booze (7)
I believe the answer is:
retsina
'strong booze' is the definition.
(Greek resinated wine)
'some regrets in absorbing' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'RETSINA' can be found hidden inside 'regrets in absorbing'.
(Other definitions for retsina that I've seen before include "Nastier (anag) - Greek wine" , "Greek drink" , "Type of Greek wine" , "Greek wine - nastier sort" , "Greek resin-flavoured wine" .)