Furious, judge after one (5)
I believe the answer is:
irate
'furious' is the definition.
(I know that furious can be written as irate)
'judge after one' is the wordplay.
'judge' becomes 'rate' (rating is a kind of judging).
'after' is a charade indicator (letters next to each other).
'one' becomes 'i' (Roman numeral).
'rate' put after 'i' is 'IRATE'.
(Other definitions for irate that I've seen before include "Annoyed, exasperated" , "having got in wax" , "A tier (anag)" , "ranting" , "Wild" .)