Soak, drench (8)
I believe the answer is:
saturate
I believe this clue is a double definition.
'soak' is the first definition.
(I know that soak is a more specific form of the action saturate)
'drench' is the second definition.
(I know that drench is a more specific form of the action saturate)
(Other definitions for saturate that I've seen before include "steep" , "flood" , "Make thoroughly wet, soak" , "Soak completely" , "Infuse or fill completely" .)