Person of great energy from March to November (5)
I believe the answer is:
demon
'person of great energy' is the definition.
(demon can mean a skilful or energetic person)
'march to november' is the wordplay.
'march' becomes 'demo' (as in a demonstration).
'to november' becomes 'N' (phonetic alphabet: alpha, bravo, charlie etc.).
'demo'+'n'='DEMON'
'from' is the link.
(Other definitions for demon that I've seen before include "Genius" , "Fanatic; devil" , "Wizard" , "See 3" , "Familiar" .)