Band beginning to sing rubbish (6)
I believe the answer is:
stripe
'band' is the definition.
(I know that band can be written as stripe)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for stripe that I've seen before include "Long band of a different colour" , "Sleeve badge showing military rank" , "Line of different colour - indicator of rank" , "Military mark of rank, chevron" , "Military sign of rank" .)