OCTAVE

Musical interval of 12 semitones (6)

Solution has appeared in 2 crosswords (1 across and 1 down):

• Quick crossword No 15,963 — 2021-07-05 23:00:11
  16D: Musical interval of 12 semitones (6)
• Quick crossword No 15,210 — 2019-02-06 00:00:25
  4A: Musical interval of 12 semitones (6)