Some join terrific team in Italy (5)
I believe the answer is:
inter
'team in italy' is the definition.
(Inter Milan, Italian football team)
'some join terrific' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'INTER' is hidden in the letters of 'join terrific'.
(Other definitions for inter that I've seen before include "Settle in ground" , "foreign footballers" , "foreign team" , "get put down!" , "Football Club seen in Milan" .)