Organised trip (4)
I believe the answer is:
tour
'organised trip' is the definition.
(trip around a certain location)
This is the entire clue.
(Other definitions for tour that I've seen before include "A sightseeing trip or journey" , "Entertainer's itinerary" , "Short trip; spell of duty" , "'Pleasure journey, visiting various places (4)'" , "Period of duty" .)