Dress or attire (6)
I believe the answer is:
clothe
I believe this is a double definition.
'dress' is the first definition.
(synonyms)
'attire' is the second definition.
(I've seen this before)
(Other definitions for clothe that I've seen before include "Provide cover for body and limbs" , "Put garments onto" , "Provide with garments" , "Equip" , "Dress (someone)" .)