Reportedly get on fine ... (4)
I believe the answer is:
fair
'fine' is the definition.
(I've seen this before)
'reportedly get on' is the wordplay.
'reportedly' shows a homophone (sound like).
'get on' becomes 'fare' (I've seen this in another clue).
'fare' is a homophone of 'FAIR'.
(Other definitions for fair that I've seen before include "Light; entertainment" , "Blonde; impartial" , "here for the ride?" , "Just; passable" , "Having light-coloured hair and skin" .)