Poet taking sweetheart round Spanish city (6)
I believe the answer is:
oviedo
'city' is the definition.
(I have seen 'Spanish city' mean 'oviedo' so perhaps 'city' could also mean 'oviedo')
'poet taking sweetheart round spanish' is the wordplay.
'poet' becomes 'Ovid' (Roman poet).
'taking' is an insertion indicator.
'sweetheart' becomes 'e' (the heart/centre of 'sweet').
'round spanish' becomes 'o' (I can't explain this - if you can you should give a lot more credence to this answer).
'ovid' enclosing 'e' is 'ovied'.
'ovied'+'o'='OVIEDO'
Can you help me to learn more?
(Other definitions for oviedo that I've seen before include "Spanish city" , "Spanish venue" .)