Limit damage produced by drink (6)
I believe the answer is:
margin
'limit' is the definition.
(thesaurus)
'damage produced by drink' is the wordplay.
'damage' becomes 'mar' (marring is a kind of damaging).
'produced by' means one lot of letters go next to another.
'drink' becomes 'gin' (gin is a kind of drink**).
'mar'+'gin'='MARGIN'
(Other definitions for margin that I've seen before include "Blank space around a page" , "Edge; room for error" , "Edge or space for error" , "Border or leeway" , "Edge, border, fringe" .)