Spryness (7)
I believe the answer is:
agility
'spryness' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for agility that I've seen before include "Physical nimbleness, easy movement" , "Gracefulness of the quick and nimble" , "Physical ability to move nimbly and quickly" , "The ability to move quickly and easily" , "dexterity" .)