Was twisting the bandage (6)
I believe the answer is:
swathe
'bandage' is the definition.
(I know that swathe is a type of bandage)
'was twisting the' is the wordplay.
'twisting' indicates anagramming the letters.
'was' anagrammed gives 'swa'.
'swa'+'the'='SWATHE'
(Other definitions for swathe that I've seen before include "considerable cut" , "Cover" , "Row or path cut through" , "A broad strip as of cut grass" , "Broad strip or area; wrap in fabric" .)