Excursion exploring old city and where it might be going (4)
I believe the answer is:
tour
'excursion' is the definition.
(I know that excursion can be written as tour)
'exploring old city and where it might be going' is the wordplay.
I cannot really understand how this works, but
'old' could be 'o' (common abbreviation eg in OE for Old English) and 'o' is found in the answer.
'city' could be 'ur' (ancient Sumerian city state) and 'ur' is found in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for tour that I've seen before include "Trip visiting several places" , "Visit a number of places" , "Journey round" , "... de France is a multi-stage cycle race" , "A sightseeing trip or journey" .)