Wash up, mate (3)
I believe the answer is:
pal
This clue could be a double definition.
'wash up' is the first definition.
Although both the answer and definition are verbs in their base form, I can't see how one could define the other.
'mate' is the second definition.
(both can mean a friend)
Can you help me to learn more?
(Other definitions for pal that I've seen before include "Mate, informal friend" , "Buddy, chum" , "Brother" , "Mate, buddy" , "Close friend" .)