Energy movement generates strong feeling (7)
I believe the answer is:
emotion
'strong feeling' is the definition.
(I've seen this before)
'energy movement' is the wordplay.
'energy' becomes 'e' (physics symbol as in E=mc2).
'movement' becomes 'motion' ('motion' can be a synonym of 'movement').
'e'+'motion'='EMOTION'
'generates' is the link.
(Other definitions for emotion that I've seen before include "Passion" , "Strong feeling, love or jealousy" , "Fear possibly" , "E.g. fear, hate etc." , "Strong feeling as of love or hate" .)