He's riled perhaps but does very little (5)
I believe the answer is:
idler
'he's' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'riled perhaps but does very little' is the wordplay.
'riled' can be anagrammed to 'IDLER'.
But, I'm unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for idler that I've seen before include "Work-shy individual" , "One reluctant to work" , "Riled (anag)" , "Reluctant worker" , "One who loafs about" .)