Maybe he makes firm declarations (14)
I believe the answer is:
pronouncements
'declarations' is the definition.
(pronouncement is a kind of declaration)
'maybe he makes firm' is the wordplay.
'maybe he' becomes 'pronoun' ('he' is a pronoun).
'makes firm' becomes 'cements' (I can't explain this - if you can you should believe this answer much more).
'pronoun'+'cements'='PRONOUNCEMENTS'
Can you help me to learn more?
(Other definitions for pronouncements that I've seen before include "declarations" , "assertions" .)