
1) Deadly sins and hills of Rome 2) Groups of seas and sins 3) Groups set step out 4) Literary gables and others 5) Lucky groups 6) Octets minus one 7) Pets set off in groups 8) Pets set out in groups 9) Rhyme royals 10) Seas and Deadly Sins 11) Seven voices 12) Seven-piece ensembles 13) Seven-player pieces
Found on
https://www.crosswordclues.com/clue/septets

1) Sevens
Found on
https://www.crosswordclues.com/clue/septets
No exact match found.