Drenched; overwhelmed (5)
I believe the answer is:
awash
I believe this is a double definition.
'drenched' is the first definition.
(I've seen this before)
'overwhelmed' is the second definition.
(I've seen this in another clue)
(Other definitions for awash that I've seen before include "Flooded with water" , "Crawling" , "Overflowing" , "Letting in the sea" , "Level with the water surface" .)