Southern dance in store (4)
I believe the answer is:
shop
'store' is the definition.
(I know that store can be written as shop)
'southern dance' is the wordplay.
'southern' becomes 's' (abbreviation).
'dance' becomes 'hop' (hop is a kind of dance).
's'+'hop'='SHOP'
'in' is the link.
(Other definitions for shop that I've seen before include "Sell" , "Give away" , "Be disloyal to" , "Retail establishment" , "Store or boutique" .)