Italian province on the Swiss border (4)
I believe the answer is:
como
(Other definitions for como that I've seen before include "singer" , "Not Italy's biggest lake" , "Italian city and lake" , "lake resort" , "North Italian lake" .)
I believe the answer is:
como
(Other definitions for como that I've seen before include "singer" , "Not Italy's biggest lake" , "Italian city and lake" , "lake resort" , "North Italian lake" .)