Crossword Genius

Heavenly region around stellar twelve revolving (6)

Ross

I believe the answer is:

zodiac

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'heavenly region' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for zodiac that I've seen before include "17 Across is a sign of the ......." , "Band of sky much used by astrologists" , "Astrologers' twelve signs" , "Astrological belt" , "Twelve-sign belt" .)

I've seen this clue in The Telegraph.
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