Crossword Genius

A group or set of nine (6)

Ross

I believe the answer is:

ennead

(Other definitions for ennead that I've seen before include "A group or set of nine" , "The Muses, say" , "Baseball team, perhaps" , "Need an alteration for a set ofnine" , "Group of nine things" .)

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