Go round old city to find mashed food for baby (5)
I believe the answer is:
puree
'find mashed food for baby' is the definition.
I can't tell whether this defines the answer.
'go round old city' is the wordplay.
'go' becomes 'pee' (both can mean to urinate).
'round' is an insertion indicator.
'old city' becomes 'ur' (ancient city state).
'pee' going around 'ur' is 'PUREE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for puree that I've seen before include "Liquidised vegetables" , "Vegetable pulp" , "process" , "Liquidise (vegetables etc)" , "Pulped fruit/veg" .)