Joint talk pompously put on my page (9)
I believe the answer is:
corporate
'joint' is the definition.
('corporate' can be similar in meaning to 'joint')
'talk pompously put on my page' is the wordplay.
'talk pompously' becomes 'orate' (I've seen this before).
'put on' is a charade indicator (letters next to each other).
'my' becomes 'cor' (I've seen this in other clues).
'page' becomes 'p'.
'cor'+'p'='corp'
'orate' after 'corp' is 'CORPORATE'.
(Other definitions for corporate that I've seen before include "belonging to a large company" , "Joint" , "Of a legal entity acting as an individual" , "Relating to a large group or company" , "Poor crate could be legally united into a body" .)