Crossword Genius

Signs of single Italians moving, leaving area (8)

Ross

I believe the answer is:

initials

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'signs' is the definition.
(initial is a kind of sign)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for initials that I've seen before include "Signs briefly" , "First letters as of names" , "Lisa in it (anag)" , "Components of an acronym" .)

I've seen this clue in The Telegraph.
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