Crouch may be short and stocky (5)
I believe the answer is:
I believe this is a quadruple definition!!
'crouch' is the first definition.
'may' is a link.
'be' is the second definition.
(squating is a kind of being)
'short' is the third definition.
(similar in meaning)
'and' acts as a link.
'stocky' is the fourth definition.
(Other definitions for squat that I've seen before include "Short, low" , "Sit on heels" , "hunch" , "short but well-filled?" , "house-sit?" .)