Crossword Genius

Test round part is going round (7)

Ross

I believe the answer is:

orbital

'going round' is the definition.
(I've seen this before)

'test round part' is the wordplay.
'test' becomes 'oral' (oral is a type of examination).
'round' indicates putting letters inside.
'part' becomes 'bit' (bit is a kind of part).
'oral' going around 'bit' is 'ORBITAL'.

'is' is the link.

(Other definitions for orbital that I've seen before include "Like a ring road" , "Revolutionary" , "Descriptive of the M25" , "Boil tar (anag)" , "Relating to planet's motion" .)

I've seen this clue in The Telegraph.
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