Bachelor with a single friend in Worcester, perhaps (4,5)
I believe the answer is:
bone china
'worcester perhaps' is the definition.
(Worcester is a type of porcelain)
'bachelor with a single friend' is the wordplay.
'bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts).
'with' means one lot of letters go next to another.
'a single' becomes 'one' (synonyms).
'friend' becomes 'china' (cockney rhyming slang, mate is china plate).
'b'+'one'+'china'='BONE CHINA'
'in' is the link.
(Other definitions for bone china that I've seen before include "Material from Potter" , "Fine things perhaps thrown" , "Form of white porcelain" , "High quality porcelain" , "Coalport" .)