Crossword Genius

Groups of six (7)

Ross

I believe the answer is:

sestets

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">groups of six</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for sestets that I've seen before include "Six performing together" , "Poetry" .)

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