Hold forth with enough people there, no question (5)
I believe the answer is:
orate
'hold forth' is the definition.
(thesaurus)
'no question' is the wordplay.
'no' becomes 'o' (resembles 0 - 'no' can mean 'zero').
'question' becomes 'rate' (I can't justify this - if you can you should give a lot more credence to this answer).
'o'+'rate'='ORATE'
'with enough people there' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for orate that I've seen before include "Lecture" , "Make a pompous speech" , "make speeches" , "Speak formally" , "Make a flowery speech" .)