Crossword Genius

… show approval of credit (4)

Ross

I believe the answer is:

tick

This clue is a double definition.

'show approval of' is the first definition.
(giving a tick indicates approval)

'credit' is the second definition.
(I've seen this in other clues)

(Other definitions for tick that I've seen before include "Second" , "Check the small mattress?" , "Minute" , "Credit; clock sound" , "Moment; bloodsucker" .)

I've seen this clue in The Guardian.
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