Crossword Genius

What can lubricate? (3,3)

Ross

I believe the answer is:

oil can

I'm a little stuck... Click here to teach me more about this clue!

'lubricate?' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'what can' is the wordplay.
'what' becomes 'oil' (I am not sure about this - if you are sure you should believe this answer much more).
'oil'+'can'='OIL-CAN'

Can you help me to learn more?

(Other definitions for oil can that I've seen before include "Lubricant dispenser" , "fuel container" .)

I've seen this clue in the Evening Standard.
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