Crossword Genius

Used on watch? (6,4)

Ross

I believe the answer is:

second hand

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

This might be a double definition.

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

'watch?' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'on' acts as a link.

Can you help me to learn more?

(Other definitions for second hand that I've seen before include "Watch component" , "Pointer on dial" , "Previously owned - part of watch" , "Part of a timepiece" , "going quickly on the clock?" .)

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