Designs alternative wrapper for right material to apply to a wound (8)
I believe the answer is:
dressing
'material to apply to a wound' is the definition.
'designs alternative wrapper for right' is the wordplay.
'alternative' indicates an anagram.
'wrapper for' is an insertion indicator.
'right' becomes 'r' (common abbreviation).
'designs' with letters rearranged gives 'dessing'.
'dessing' placed around 'r' is 'DRESSING'.
(Other definitions for dressing that I've seen before include "Compress" , "plaster, for example?" , "Saucy thing" , "but not stripping!" , "French or vinaigrette, say" .)