Outline a stupid speech where nothing’s deleted (11)
I believe the answer is:
adumbration
'outline' is the definition.
(thesaurus)
'a stupid speech where nothing's deleted' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'stupid' could be 'dumb' (similar in meaning) and 'dumb' is present in the answer.
'nothing' could be 'o' (looks like zero - 0) and 'o' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for adumbration that I've seen before include "Act of overshadowing" , "(An) outlining or foreshadowing" .)