Band's tour plugging covers of single (6)
I believe the answer is:
stripe
'band's' is the definition.
(synonyms)
'tour plugging covers of single' is the wordplay.
'tour' becomes 'trip' (I've seen this in another clue).
'plugging' indicates putting letters inside (I've seen this in other clues).
'covers of' means to remove the middle letters.
'single' with its centre removed is 'se'.
'trip' put into 'se' is 'STRIPE'.
(Other definitions for stripe that I've seen before include "Length of material, maybe showing rank" , "Sign of a soldier's rank" , "Broad band" , "Piece of braid indicating military rank" , "Band of colour, maybe of rank" .)