City’s spin over oil spill (7)
I believe the answer is:
tripoli
'city's' is the definition.
(Tripoli is an example)
'spin over oil spill' is the wordplay.
'spin over' becomes 'trip' (I can't explain this - if you can you should believe this answer much more).
'spill' is an anagram indicator.
'oil' is an anagram of 'oli'.
'trip'+'oli'='TRIPOLI'
Can you help me to learn more?
(Other definitions for tripoli that I've seen before include "North African port" , "where there's been regime change" , "City in Libya - city in Lebanon" , "powdery deposit" , "Libyan port" .)