Someone leaving is energetic type (4)
I believe the answer is:
goer
I believe this is a double definition.
'someone' is the first definition.
(goer is a kind of someone)
'is energetic type' is the second definition.
(I've seen this before)
'leaving' is the link.
(Other definitions for goer that I've seen before include "Someone lively" , "one trying to succeed" , "Lively person -- feasible idea" , "Energetic type" , "Lively energetic person" .)