Dressing for every final indoors (7)
I believe the answer is:
Here is my best explanation:
'dressing' is the definition.
(I have seen 'Medical dressing ' mean 'plaster' so perhaps 'dressing' could also mean 'plaster')
I don't understand the remainder of the clue.
(Other definitions for plaster that I've seen before include "A paste; a dressing", "Small wound dressing", "Adhesive material", "one sticking on through injury?", "Wall and ceiling covering", "Smear", "Material applied to walls", "One to cover wall, wound", "First-aid item" and "Smooth covering for walls and ceilings".)