Ultimately I hear you and a supporter are following the incident (10)
I believe the answer is:
eventually
'ultimately' is the definition.
(synonyms)
'i hear you and a supporter are following the incident' is the wordplay.
'i hear' indicates a 'sounds like' (homophone) clue.
'and' means one lot of letters go next to another.
'a supporter' becomes 'ally' (I've seen this in another clue).
'are following' is a charade indicator (letters next to each other).
'the incident' becomes 'event' (I've seen this before).
'you' sounds like 'u'.
'u' next to 'ally' is 'ually'.
'ually' after 'event' is 'EVENTUALLY'.
(Other definitions for eventually that I've seen before include "Finally" , "In the fullness of time" , "sooner or later" , "At last" , "In due course" .)