Surrey's top dean broke chair (5)
I believe the answer is:
sedan
'chair' is the definition.
(sedan chair is a type of chair)
'surrey's top dean broke' is the wordplay.
'top' suggests taking the first letters (in a down clue, the first letter is top).
'broke' indicates anagramming the letters.
The initial letter of 'surrey' is 's'.
'dean' with letters rearranged gives 'edan'.
's'+'edan'='SEDAN'
(Other definitions for sedan that I've seen before include "Four-door car" , "Old portable chair for Danes" , "Type of chair that's carried" , "outmoded form of transport" , "Where Prussians defeated French" .)