Fabled loner working to become chemist (6,5)
I believe the answer is:
alfred nobel
'chemist' is the definition.
(I know that Alfred Nobel is a chemist)
'fabled loner working' is the wordplay.
'working' indicates an anagram.
'fabled'+'loner'='fabledloner'
'fabledloner' with letters rearranged gives 'ALFRED NOBEL'.
'to become' acts as a link.
(Other definitions for alfred nobel that I've seen before include "Guy responsible for dynamite" , "Explosives expert" .)