Clothing from soldier turned up during disorderly retreat (3-3)
I believe the answer is:
rig out
'clothing' is the definition.
(I have seen 'Complete clothing' mean 'rig out' so perhaps 'clothing' could also mean 'rig out')
'soldier turned up during disorderly retreat' is the wordplay.
'soldier' becomes 'gi' (government issue or general issue).
'turned up' says the letters should be written in reverse.
'during' is an insertion indicator.
'disorderly retreat' becomes 'rout' (I've seen this before).
'gi' reversed gives 'ig'.
'ig' put within 'rout' is 'RIG-OUT'.
'from' acts as a link.
(Other definitions for rig out that I've seen before include "Person's clothing or costume" , "Complete clothing" , "Dress for a specific purpose" , "Informally an outfit of clothes" .)