Crossword Genius

Wheel center (3)

Ross

I believe the answer is:

'wheel center' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for hub that I've seen before include "Focus" , "Centre of wheel" , "Centre of activity" , "Centre or axis" , "Focal point of activity" .)

I've seen this clue in the LA Times and The Mirror.
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