Have a soak (5)
I believe the answer is:
'have a soak' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bathe that I've seen before include "Swim for pleasure, and clean oneself" , "Immerse oneself in water" , "Wash, soak" , "Immerse in liquid for wash" , "Become immersed in" .)