Set of clubs in Johnson's office (11)
I believe the answer is:
premiership
'office' is the definition.
(premiership is a kind of office)
'set of clubs in' is the wordplay.
'set of clubs' becomes 'premiers' (I am not sure about this - if you are sure you should believe this answer much more).
'in' becomes 'hip' (both can mean fashionable).
'premiers'+'hip'='PREMIERSHIP'
'johnson's' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for premiership that I've seen before include "One-time position of North's" , "main football clubs" , "A set of clubs" , "Office of Prime Minister" , "Liverpool's office" .)