Physical good health (6)
I believe the answer is:
vigour
(Other definitions for vigour that I've seen before include "Energy, pep" , "Potency" , "Strength, good health" , "Great strength and energy" , "Energy, forcefulness" .)
I believe the answer is:
vigour
(Other definitions for vigour that I've seen before include "Energy, pep" , "Potency" , "Strength, good health" , "Great strength and energy" , "Energy, forcefulness" .)