Share a great amount intended for audience (9)
I believe the answer is:
allotment
'share' is the definition.
(allotment is a kind of share)
'a great amount intended for audience' is the wordplay.
'a great amount' becomes 'allot' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'intended' becomes 'meant' (to mean something is to intend it).
'for audience' shows a homophone (sound like).
'meant' is a homophone of 'ment'.
'allot'+'ment'='ALLOTMENT'
(Other definitions for allotment that I've seen before include "share in growing concern?" , "patch" , "Rented garden plot" , "Small rented gardening plot" , "Vegetable plot" .)