Labour man: he's cruel, unfortunately (8)
I believe the answer is:
hercules
'labour man' is the definition.
(Hercules completed 12 labours)
'he's cruel unfortunately' is the wordplay.
'unfortunately' is an anagram indicator (a bad or unfortunate spelling).
'hes'+'cruel'='hescruel'
'hescruel' anagrammed gives 'HERCULES'.
(Other definitions for hercules that I've seen before include "Greek hero who performed 12 labours to achieve immortality" , "Fabled performer of labours" , "Mighty hero of Greek mythology" , "Mythical strongman celebrated for his "labours"" , "Strong hero" .)