Somewhere in Italy I lost a shadow (5)

I believe the answer is:

umbra

I'm a little stuck... Click here to teach me more about this clue!

'shadow' is the definition.
(I know that umbra is a type of shadow)

I don't understand the remainder of the clue.

(Other definitions for umbra that I've seen before include "Dark shadow cast by earth in eclipse" , "Full shadow" , "Burma (anag.)" , "Rumba (anag.)" , "dark place" .)

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app