Crossword Genius

Squeak stopper (3)

Ross

I believe the answer is:

oil

'squeak stopper' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for oil that I've seen before include "SECOND PART OF 23" , "Slippery liquid" , "Viscous substance as lubricant" , "Greasy liquid" , "What can be extracted" .)

I've seen this clue in The New York Times and the King Feature Syndicate.
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