Resilience enlivens pirouettes? No energy needed! (7)
I believe the answer is:
stamina
'resilience' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for stamina that I've seen before include "bottom" , "Endurance, strength to stay the course" , "Sustained energy" , "capacity to endure" , "fortitude" .)