Crossword Genius

A catch held at the end, Victor dropped in match getting tense (6)

Ross

I believe the answer is:

detent

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'a catch' is the definition.
(detent is a kind of catch)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for detent that I've seen before include "Catch preventing motion until released" , "This will check motion" .)

I've seen this clue in The Hindu.
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