Old city is gone round by Thomas -- contributing to this? (7)
I believe the answer is:
tourism
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'old city is gone round by thomas' is the wordplay.
'old city' becomes 'ur' (ancient city state).
'gone round by' means one lot of letters goes inside another.
'thomas' becomes 'tom'.
'ur'+'is'='uris'
'uris' put within 'tom' is 'TOURISM'.
'contributing to' acts as a link.
Can you help me to learn more?
(Other definitions for tourism that I've seen before include "Holiday travel business" , "Leisure travel and activities" , "travelling of people" , "going places" , "Holiday visits" .)