Crossword Genius

In French port, reportedly pawn fashionable brooch (9)

Ross

I believe the answer is:

breastpin

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'brooch' is the definition.
(type of brooch)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Another definition for breastpin that I've seen is " decoration at the front".)

I've seen this clue in The Telegraph.
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