Injured scout receives cold plaster (6)
I believe the answer is:
stucco
'plaster' is the definition.
(stucco is a kind of plaster)
'injured scout receives cold' is the wordplay.
'injured' is an anagram indicator.
'receives' is an insertion indicator.
'cold' becomes 'c' (eg on taps).
'scout' anagrammed gives 'stuco'.
'stuco' enclosing 'c' is 'STUCCO'.
(Other definitions for stucco that I've seen before include "Outer layer" , "Plaster for coating exterior walls" , "Durable finish for walls" , "Mixture for decorative use on buildings" , "Decorative plasterwork" .)