Do-to-do delivery? (6)
I believe the answer is:
octave
(Other definitions for octave that I've seen before include "between two pitches" , "Series of eight notes in music" , "At cove (anag.)" , "Eight-note range" , "A verse of eight lines" .)
I believe the answer is:
octave
(Other definitions for octave that I've seen before include "between two pitches" , "Series of eight notes in music" , "At cove (anag.)" , "Eight-note range" , "A verse of eight lines" .)