Roadside pull-in (3-2)
I believe the answer is:
lay-by
'roadside pull-in' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lay-by that I've seen before include "Into which one may pull over" , "Parking area at the roadside" , "Stopping-place" , "Pull-in area alongside a road" , "Stopping area by road" .)