Game with square legs (8)
I believe the answer is:
ninepins
'game' is the definition.
(ninepins is a kind of game)
'with square legs' is the wordplay.
'with' says to put letters next to each other.
'square' becomes 'nine' (I've seen this before).
'legs' becomes 'pins' (pin is a kind of leg).
'nine' next to 'pins' is 'NINEPINS'.
(Other definitions for ninepins that I've seen before include "Skittles (IX, not V)" , "Bowling game" , "Skittles, IX objects to be knocked down" , "Form of skittles" , "Bowling targets" .)