Crossword Genius

Clock sound (4)

Ross

I believe the answer is:

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

This is the entire clue.

(Other definitions for tick that I've seen before include "Check mark" , "Minute" , "Credit - bloodsucker" , "Parasite - mark of approval" , "Credit (sl.)" .)

I've seen this clue in the LA Times, The Star Tribune, the USA Today and the Newsday.
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