field (agricultural, sports)
battlefield, airfield
range
signal (mobile network)
shot (film)
(art) background (of a painting)
(in Venice) square (smaller than a piazza)
www.europe-cities.com › Italy › Venice › Attractions in Venice
Guide to Italy ... you will find yourself on one of the city's numerous squares, called campi in Italian, for they started out as grassy fields (campo means 'field'). ...
Thanks, Dr Filth. It looks as if "Italian town" in the clue should read "Venice". I googled Siena and found plenty or references to the main square as Piazza del Campo, which can hardly mean Square Square, but might mean Field Square/Meadow Square. But it's still a piazza, not a campo. Qualified apology to Kate.