A Catholic circle needs more than one (3)

I believe the answer is:

arc

'circle needs more than one' is the definition.
(an arc is a section of a circle)

'a catholic' is the wordplay.
'catholic' becomes 'rc' (I've seen this in other clues).
'a'+'rc'='ARC'

(Other definitions for arc that I've seen before include "Section of curve" , "be rapidly discharged" , "development of plot" , "Car (anag.)" , "Segment of circle" .)

I've seen this clue in The Times.

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