Crossword Genius

A lubricant (6)

Ross

I believe the answer is:

grease

'a lubricant' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for grease that I've seen before include "Musical animal fat?" , "Musical starring John Travolta and Olivia Newton-John" , "Lubricating agent" , "Musical that sounds like a country" , "'Thick, fatty oil (6)'" .)

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