Soldier carrying king’s coat (5)
I believe the answer is:
parka
'coat' is the definition.
(I know that parka is a type of coat)
'soldier carrying king's' is the wordplay.
'soldier' becomes 'para' (paratrooper).
'carrying' indicates putting letters inside.
'king' becomes 'K' (abbreviation for king in chess).
'para' enclosing 'k' is 'PARKA'.
(Other definitions for parka that I've seen before include "Weatherproof jacket with hood" , "Short, hooded coat" , "Hooded waterproof coat" , "Warm, hooded coat" , "Anorak" .)