He's riled perhaps but he does nothing (5)

I believe the answer is:

idler

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'but he does nothing' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'he's riled' is the wordplay.
'riled' anagrams to 'IDLER'.
However, I'm unsure how the anagram is indicated.

'perhaps' acts as a link.

Can you help me to learn more?

(Other definitions for idler that I've seen before include "One does little" , "Layabout; ship crewman not on watch" , "Man off watch" , "Lollard" , "A lazy loafer" .)

I've seen this clue in The Globe and Mail.

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