Void one or more rings (6)

I believe the answer is:

annuli

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'more rings' is the definition.
'annuli' can be an answer for 'rings' (plural of annulus - 'annulus' means a ring). I'm unsure of the 'more' bit.

'void one' is the wordplay.
'void' becomes 'annul' (synonyms).
'one' becomes 'i' (Roman numeral).
'annul'+'i'='ANNULI'

'or' acts as a link.

Can you help me to learn more?

(Other definitions for annuli that I've seen before include "Ring-shaped objects" , "round these parts" , "Areas between two concentric circles" .)

I've seen this clue in the Sydney Morning Herald.

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