Mark right watch sound (4)

I believe the answer is:

tick

I believe this is a double definition.

'mark right' is the first definition.
(to tick something is to mark it correct or right)

'watch sound' is the second definition.
(I've seen this in another clue)

(Other definitions for tick that I've seen before include "Second" , "Insect; noise of watch" , "Mark correct, parasite" , "Check the small mattress?" , "Make sound like old clock" .)

I've seen this clue in The Irish Independent.

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