Character seen with drink: JFK for one (7)
I believe the answer is:
airport
'jfk for one' is the definition.
(I've seen this in another clue)
'character seen with drink' is the wordplay.
'character' becomes 'air' (air can mean a character or mood).
'seen with' means one lot of letters go next to another.
'drink' becomes 'port' (port is a kind of drink).
'air'+'port'='AIRPORT'
(Other definitions for airport that I've seen before include "you may expect to fly here" , "Fliers' terminus" , "eg Stansted" , "Aviation complex" , "Destination for planes" .)