Published, being supported by advance -- result! (7)
I believe the answer is:
outcome
'result' is the definition.
('outcome' can be a synonym of 'result')
'published being supported by advance' is the wordplay.
'published' becomes 'out' (I've seen this in other clues).
'being supported by' says to put letters next to each other (letters go below - in down clue).
'advance' becomes 'come' (I've seen this in other clues**).
'out'+'come'='OUTCOME'
(Other definitions for outcome that I've seen before include "Denouement" , "Consequence, upshot" , "Cute moo (anag.)" , "Result or consequence" , "'Result, upshot (7)'" .)