After swilling a lot of claret (5)
I believe the answer is:
later
'after' is the definition.
(I've seen this in another clue)
'swilling a lot of claret' is the wordplay.
'swilling' is an anagram indicator (swill can mean to stir or swirl round).
'a lot of' means to remove the first letter.
'claret' with its first letter taken off is 'laret'.
'laret' is an anagram of 'LATER'.
(Other definitions for later that I've seen before include "more modern" , "Tomorrow (or next week)?" , "Afterward, subsequent" , "Not just yet" , "Eventually" .)