Features of a square dance in trading establishment (6,4)
I believe the answer is:
corner shop
'trading establishment' is the definition.
The definition suggests a singular noun which matches the answer.
'features of a square dance' is the wordplay.
'features of a square' becomes 'corners' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'dance' becomes 'hop' (hop is a kind of dance).
'corners'+'hop'='CORNER SHOP'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for corner shop that I've seen before include "Small local retailer" , "Small retail outlet" , "Local outlet" , "Retail establishment on the angle of two streets?" .)