Garment a soldier is allowed (5)
I believe the answer is:
gilet
'garment' is the definition.
Both the definition and answer are singular nouns.
Maybe there's an association between them I don't understand?
'a soldier is allowed' is the wordplay.
'a soldier' becomes 'gi' (government issue or general issue**).
'is allowed' becomes 'let' (I've seen this before).
'gi'+'let'='GILET'
Can you help me to learn more?
(Other definitions for gilet that I've seen before include "Type of jacket" , "apparel" , "Body-warmer" , "Sleeveless padded jacket" , "Waistcoat" .)