Crossword Genius

A run around part of the Circle Line? (3)

Ross

I believe the answer is:

arc

'the circle line?' is the definition.
(an arc is a line forming part of a circle)

'a run around' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'around' becomes 'c' (abbreviation for 'circa').
'a'+'r'+'c'='ARC'

'part of' is the link.

(Other definitions for arc that I've seen before include "Electrical spark" , "Rainbow, e.g." , "less than the complete circuit" , "Curved section" , "Part of circle; discharge" .)

I've seen this clue in The Times.
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