Soldiers do so fully clothed (5)
I believe the answer is:
dress
'clothed' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'soldiers do so fully' is the wordplay.
I cannot really understand how this works, but
'soldiers' could be 'res' and 'res' is present in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for dress that I've seen before include "female garment" , "Shift" , "Adorn" , "formal wear" , "Put on one's clothes" .)