Short, stocky (5)
I believe the answer is:
squat
I believe this clue is a double definition.
'short' is the first definition.
(similar in meaning)
'stocky' is the second definition.
(synonyms)
(Other definitions for squat that I've seen before include "Short and dumpy; occupy building" , "Short and thick" , "occupy room?" , "Refuse to move on" , "Building occupied without permission" .)