Something heavenly to go round in (5)

I believe the answer is:

orbit

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'round in' is the definition.
'orbit' can be an answer for 'round' (I've seen this before). I'm not certain of the 'in' bit.

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

Can you help me to learn more?

(Other definitions for orbit that I've seen before include "Path eg of heavenly body" , "Rotating path" , "field of activity" , "Planetary path" , "Lunar trajectory" .)

I've seen this clue in the Evening Standard.

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