Gangways (6)
I believe the answer is:
aisles
'gangways' is the definition.
('aisle' can be a synonym of 'gangway')
This is all the clue.
(Other definitions for aisles that I've seen before include "Gangways" , "Passageways between seats" , "Spaces between seats" , "Lassie (anag.)" , "Lassie in church pathways" .)