Left, for example, on one side (3)
I believe the answer is:
leg
'left' is the definition.
(left leg)
'example on one side' is the wordplay.
'example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'on' is a charade indicator (letters next to each other).
'one side' becomes 'l' (abbreviation for left).
'eg' after 'l' is 'LEG'.
'for' is the link.
(Other definitions for leg that I've seen before include "Stage (of race)" , "Projecting support for chair or table" , "Lower limb" , "prop" , "Limb; stage" .)