It's a very short distance to one Italian city (5)
I believe the answer is:
milan
'one italian city' is the definition.
(city in Italy)
'it's a very short distance' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is found in the answer.
'distance' could be 'mil' (I have seen 'tiny distance' mean 'mil' so perhaps 'distance' could also mean 'mil') and 'mil' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for milan that I've seen before include "North Italian city" , "Italian city with La Scala opera house" , "N. Italian city" , "Capital of Lombardy" , "Northern Italian city" .)