Wide-ranging Italian sport (4)
I believe the answer is:
polo
I believe this clue is a double definition.
'wide-ranging italian' is the first definition.
(Venetian explorer Marco Polo)
'sport' is the second definition.
(polo is a kind of sport)
(Other definitions for polo that I've seen before include "Sweet" , "Marco" , "Horsey ball game" , "Venetian 19 to Asia, servant to Kublai Khan" , "Equestrian sport" .)