Crossword Genius

Port makes singer lose voice quality (4)

Ross

I believe the answer is:

bari

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'port' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for bari that I've seen before include "Adriatic resort" , "Adriatic port" , "Adriatic seaport" .)

I've seen this clue in The Telegraph.
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