Not written in any key (6)
I believe the answer is:
atonal
(Other definitions for atonal that I've seen before include "Unaccented" , "Not in a key (mus.)" , "An alto (anag) - without a fixed key" , "Keyless" , "(Of music) without key" .)
I believe the answer is:
atonal
(Other definitions for atonal that I've seen before include "Unaccented" , "Not in a key (mus.)" , "An alto (anag) - without a fixed key" , "Keyless" , "(Of music) without key" .)