Pop's broken tea service (5)
I believe the answer is:
china
'service' is the definition.
(I've seen this before)
'pop's broken tea' is the wordplay.
'pop' becomes 'in' (both can mean popular).
'broken' indicates putting letters inside (inserted letters break into others).
'tea' becomes 'cha' (cha is a type of tea).
'in' placed into 'cha' is 'CHINA'.
(Other definitions for china that I've seen before include "World's most populous country" , "Porcelain ware and country" , "It's fragile, though its economy is not!" , "Asian country" , "Beijing's country" .)