Smuggled in by con, drink for passing round (8)
I believe the answer is:
skirting
'passing round' is the definition.
(to skirt is to avoid or pass round)
'smuggled in by con drink' is the wordplay.
'smuggled in by' indicates putting letters inside.
'con' becomes 'sting' (synonyms).
'drink' becomes 'kir' (I've seen this before).
'sting' enclosing 'kir' is 'SKIRTING'.
'for' acts as a link.
(Other definitions for skirting that I've seen before include "fabric" , "Board at base of wall" , "Avoiding the issue, or trying to" , "Going around the edge" , "Material" .)