Having done the dishes, all finished (6,2)
I believe the answer is:
washed up
'finished' is the definition.
(thesaurus)
'having done the dishes all' is the wordplay.
I cannot really understand how this works, but
'done' could be 'up' (both can mean finished or at an end) and 'up' is found in the answer.
The remaining letters 'washed' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for washed up that I've seen before include "Did kitchen duty" , "Done for - cleaned dishes" , "exhausted" , "Defeated or failed - left on shore? (6, 2)" , "No longer successful (colloq.)" .)