I think US city will provide racetrack (5)
I believe the answer is:
imola
'racetrack' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?
'i think us city' is the wordplay.
'i think' becomes 'imo' (abbreviation for 'in my opinion').
'us city' becomes 'LA' (abbreviation for Los Angeles).
'imo'+'la'='IMOLA'
'will provide' acts as a link.
Can you help me to learn more?
(Other definitions for imola that I've seen before include "race here?" , "Italian town" , "Italian motor-racing circuit" , "Grand Prix circuit" , "Grand Prix track" .)