Month to join speaker and painter (9)
I believe the answer is:
decorator
'painter' is the definition.
(someone paid to decorate with paint)
'month to join speaker' is the wordplay.
'month' becomes 'Dec' (abbreviation for December).
'to join' means one lot of letters go next to another.
'speaker' becomes 'orator' (orator is a kind of speaker).
'dec'+'orator'='DECORATOR'
'and' is the link.
(Other definitions for decorator that I've seen before include "Painter, wallpaper hanger" , "Handyman" , "Who paints" , "Painter perhaps" , "Artisan" .)