Segment of the debacle from The Sound of Music perhaps (4)
I believe the answer is:
clef
'segment' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'the debacle from the sound of music perhaps' is the wordplay.
'CLEF' is hidden in amongst the letters.
But, I'm uncertain how the hidden word is indicated.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for clef that I've seen before include "Symbol on the left of a musical stave" , "Treble or bass symbol?" , "Sign at start of stave" , "Written musical symbol indicating pitch" , "Treble or bass sign?" .)