Crossword Genius

It's used for ticker? (6-4)

Ross

I believe the answer is:

second-hand

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for second-hand that I've seen before include "Not original" , "Not new - part of watch!" , "Previously owned - part of watch" , "Used" .)

I've seen this clue in the Sydney Morning Herald.
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