Friend has tea brought round at home (5)
I believe the answer is:
china
'friend' is the definition.
(cockney rhyming slang, mate is china plate)
'tea brought round at home' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'brought round' is an insertion indicator.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'cha' enclosing 'in' is 'CHINA'.
'has' is the link.
(Other definitions for china that I've seen before include "Variety of rose" , "Beijing's country" , "Delicate porcelain form Orient?" , "Land" , "chum" .)