Lively and active (4)
I believe the answer is:
spry
'lively and active' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spry that I've seen before include "Light on one's feet" , "Nimble, brisk" , "'Agile, nimble (4)'" , "Far from doddering" , "Quick and agile" .)