All-round scope (6)

I believe the answer is:

sphere

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'scope' is the definition.
(thesaurus)

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

(Other definitions for sphere that I've seen before include "Globe or ball" , "Round object" , "Orb or globe" , "Round solid figure with every point on its surface equidistant from its centre" , "Globe or domain" .)

I've seen this clue in the Evening Standard.

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