Seating choice (5)
I believe the answer is:
aisle
'seating choice' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aisle that I've seen before include "'Passage, gangway (5)'" , "Passageway between blocks of seats" , "lateral strip" , "Supermarket passageway" , "Here comes the bride" .)