Large embrace with energy (4)
I believe the answer is:
huge
'large' is the definition.
(similar in meaning)
'embrace with energy' is the wordplay.
'embrace' becomes 'hug' (hug is a kind of embrace).
'with' says to put letters next to each other.
'energy' becomes 'e' (physics symbol as in E=mc2).
'hug'+'e'='HUGE'
(Other definitions for huge that I've seen before include "Great in size or amount" , "Extremely large" , "Gigantic" , "giant" , "Jumbo" .)