Lazybones strangely riled (5)
I believe the answer is:
idler
'lazybones' is the definition.
(I've seen this before)
'strangely riled' is the wordplay.
'strangely' is an anagram indicator.
'riled' is an anagram of 'IDLER'.
(Other definitions for idler that I've seen before include "who makes no effort" , "Slacker" , "Person who does no work" , "Couch potato" , "Reluctant worker" .)