Dynamism (6)
'dynamism' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for energy that I've seen before include "Power - drive" , "Fuel" , "Vigour, spirit" , "Seventeen forty six defeat for Bonnie Prince Charlie" , "Vigour, vim, vitality" .)
'dynamism' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for get-up-and-go that I've seen before include "Vim" , "'pizazz'" .)