Go round capital of Italy — and you wouldn't see this! (5)
I believe the answer is:
turin
'go round capital of italy and you wouldn't see this' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'italy' relates to this answer.
'go round capital of italy' is the wordplay.
'go' becomes 'turn' (as in one's go or turn in a game).
'round' indicates putting letters inside.
'capital of' indicates taking the first letters.
The first letter of 'italy' is 'i'.
'turn' placed around 'i' is 'TURIN'.
(Other definitions for turin that I've seen before include "14 Italian city" , "NW Italian city with famous Shroud" , "Italian location" , "Industrial city of Piedmont" , "First capital in 1861 of united Italy" .)