Piece of furniture that's chosen by PM (7)
I believe the answer is:
cabinet
'piece of furniture' is the definition.
(cabinet is a kind of piece of furniture)
'chosen by pm' is the wordplay.
I cannot quite understand how this works, but
'chosen' could be 'in' ('you're in!') and 'in' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'that's' is the link.
Can you help me to learn more?
(Other definitions for cabinet that I've seen before include "Peel once topped this" , "Display cupboard - senior ministers" , "It may be shelved" , "Piece of furniture with doors, shelves and drawers" , "Furniture item or collective government ministers" .)