Hops off to emporium (4)
I believe the answer is:
shop
'emporium' is the definition.
(I've seen this in another clue)
'hops off' is the wordplay.
'off' indicates anagramming the letters.
'hops' with letters rearranged gives 'SHOP'.
'to' acts as a link.
(Other definitions for shop that I've seen before include "sales outlet" , "Establishment for the sale of goods" , "Inform on (slang)" , "Be disloyal to" , "Retail premises" .)