Song stuck in head — “One city” (7)
I believe the answer is:
nairobi
'city' is the definition.
(Nairobi is an example)
'song stuck in head one' is the wordplay.
I cannot quite see how this works, but
'song' could be 'air' (I've seen this before) and 'air' is present in the answer.
'head' could be 'nob' (I've seen this in other clues) and 'nob' is present in the remaining letters.
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nairobi that I've seen before include "City of Kenya" , "Robinia strangely found in Kenya" , "The capital of Kenya (7)" , "Kenyan capital" , "East African capital" .)