Crossword Genius

Centre of revolution (3)

Ross

I believe the answer is:

hub

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

This clue could be a double definition.

'centre' is the first definition.
(hub is a kind of centre)

'revolution' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'of' acts as a link.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.
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