A musical lubricant? (6)

I believe the answer is:

grease

I believe this clue is a double definition.

'a musical' is the first definition.
(Grease is a film musical)

'lubricant?' is the second definition.
(I know that grease is a type of lubricant)

(Other definitions for grease that I've seen before include "Rock musical" , "Mechanic (informal)" , "Fatty lubricant" , "Fully aware, astonished" , "bribe" .)

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

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