Don't remember you'd already washed? (5,6)

'don't remember you'd already washed?' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'don't remember you'd already washed?' is the wordplay.
I cannot really understand how this works, but
'washed?' could be 'clean' (similar in meaning) and 'clean' is located in the answer.
'don't remember' could be 'forget' (I've seen this before) and 'forget' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

Can you help me to learn more?