Fresh voice involving hot reporter (9)
I believe the answer is:
newshound
'reporter' is the definition.
(I've seen this in another clue)
'fresh voice involving hot' is the wordplay.
'fresh' becomes 'new' (similar in meaning).
'voice' becomes 'sound' (synonyms).
'involving' means one lot of letters goes inside another.
'hot' becomes 'h' (abbreviation eg on taps).
'sound' going around 'h' is 'shound'.
'new'+'shound'='NEWSHOUND'
(Other definitions for newshound that I've seen before include "Paper reporter" , "assiduous seeker of stories" , "American journalist" , "read this person's reports?" , "He's after a story" .)