Soldier's jacket (5)
I believe the answer is:
tunic
'soldier's jacket' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tunic that I've seen before include "Close fitting jacket as part of uniform" , "Shift" , "(Policeman's) jacket" , "Military uniform" , "Loose fitting light cloak extending to the hip or lower" .)