Cockney friend's crockery (5)
I believe the answer is:
china
I believe this clue is a double definition.
'cockney friend's' is the first definition.
(china plate is Cockney rhyming slang for mate)
'crockery' is the second definition.
(eg china plates)
(Other definitions for china that I've seen before include "pottery" , "Londoner's friend" , "The most populous country in the world" , "Dishes, vases or ornaments" , "bud" .)