Chorus of mad women dismissing memo (4)
I believe the answer is:
dawn
'chorus' is the definition.
(dawn chorus is a type of chorus)
'mad women dismissing memo' is the wordplay.
I cannot really see how this works, but
'women' could be 'w' and 'w' is found within the answer.
The remaining letters 'dan' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for dawn that I've seen before include "Aurora, poetically" , "Sunrise" , "beginning" , "Cockcrow" , "Light in East" .)