Trips made by drunkard rolling over outside old city (5)
I believe the answer is:
tours
'trips' is the definition.
(I've seen this before)
'drunkard rolling over outside old city' is the wordplay.
'drunkard' becomes 'sot' ('sot' can be a synonym of 'drunkard').
'rolling over' shows that the letters should be reversed in order.
'outside' indicates putting letters inside.
'old city' becomes 'ur' (ancient city state).
'sot' back-to-front is 'tos'.
'tos' going around 'ur' is 'TOURS'.
'made by' acts as a link.
(Other definitions for tours that I've seen before include "Travels round -- French 7" , "Excursions" , "city in France" , "Capital of France's Indre-et-Loire department" , "French city" .)