Rule taxi should rush around Urbana and enjoy greatly (9)

I believe the answer is:

luxuriate

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'enjoy greatly' is the definition.
'luxuriate' can be an answer for 'enjoy' (thesaurus). I'm not certain of the 'greatly' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for luxuriate that I've seen before include "Revel in indulgence" , "Enjoy greatly, to excess perhaps" , "Indulge oneself" .)

I've seen this clue in The Hindu.

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