The address for the delivery (7)
I believe the answer is:
oration
'the address' is the definition.
(oration is a kind of address)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for oration that I've seen before include "Power of speech" , "A formal or ceremonial speech" , "eulogy" , "Major speech" , "A long ceremonial speech" .)