Reversing places with soldiers in a daze (6)
I believe the answer is:
stupor
'in a daze' is the definition.
(I've seen this before)
'reversing places with soldiers' is the wordplay.
'reversing' says the letters should be written backwards.
'places' becomes 'puts' ('put' can be a synonym of 'place').
'with' means one lot of letters go next to another.
'soldiers' becomes 'or' (Other Rank).
'puts' back-to-front is 'stup'.
'stup'+'or'='STUPOR'
(Other definitions for stupor that I've seen before include "Shocked or drunken state" , "State of bewilderment" , "Proust found in dazed condition" , "Semi-comatose state" , "numbness" .)