Crossword Genius

Drunk? Not Rusty! (5)

Ross

I believe the answer is:

oiled

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'drunk?' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

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(Other definitions for oiled that I've seen before include "Besotted" , "Lubricated or drunk" , "protected from rust?" , "running smoothly?" , "tipsy" .)

I've seen this clue in the Evening Standard.
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