Crossword Genius

Pair of silver buckles fop sadly lost in duels (9)

Ross

I believe the answer is:

rivalries

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

'duels' is the definition.
The answer and definition can be both acts as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I don't understand the remainder of the clue.

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I've seen this clue in The Times.
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