Roadside accommodation army doctor hired going north (5)
I believe the answer is:
motel
'roadside accommodation' is the definition.
(I've seen this before)
'army doctor hired going north' is the wordplay.
'army doctor' becomes 'MO' (medical officer).
'hired' becomes 'let' (I've seen this before).
'going north' is a reversal indicator.
'let' back-to-front is 'tel'.
'mo'+'tel'='MOTEL'
(Other definitions for motel that I've seen before include "Accommodation for road travellers" , "Hotel designed for the motorist" , "Place for drivers to stay" , "Lodging for drivers" , "Drive-in lodging house" .)