Address a chap with energy (5)
I believe the answer is:
abode
'address' is the definition.
(abode is a kind of address)
'a chap with energy' is the wordplay.
'chap' becomes 'bod' (I've seen this in other clues**).
'with' says to put letters next to each other.
'energy' becomes 'e' (physics symbol as in E=mco).
'a'+'bod'+'e'='ABODE'
(Other definitions for abode that I've seen before include "House, home" , "stay" , "Home or domicile" , "Place of residence" , "House made of adobe" .)