Remains as he is (5)
I believe the answer is:
ashes
'remains' is the definition.
(I've seen this in another clue)
'as he is' is the wordplay.
'he is' becomes 'he's'.
'as'+'hes'='ASHES'
(Other definitions for ashes that I've seen before include "sports contest" , "Remains of the Yule logs?" , "` `..... to ....., dust to dust' ' (prayer)" , "Cinders - which were once kept in the 3 20 at 18" , "Residue form fires" .)