Left, for instance? There’s a right one, too! (3)
I believe the answer is:
leg
'left for instance?' is the definition.
(I know that left hand is a type of paw)
I don't understand how the rest of the clue works.
(Other definitions for leg that I've seen before include "Support; cricket side" , "prop" , "Gigot" , "Projecting support for chair or table" , "Run < on" .)