List of appalling Conservative after Conservative (9)
I believe the answer is:
directory
'list' is the definition.
(I know that directory is a type of list)
'appalling conservative after conservative' is the wordplay.
'appalling' becomes 'dire' (I've seen this in another clue).
'conservative' becomes 'C' (UK political abbreviation).
'after' means one lot of letters go next to another.
'conservative' becomes 'tory' (informal term for a Conservative Party member).
'dire'+'c'+'tory'='DIRECTORY'
'of' is the link.
(Other definitions for directory that I've seen before include "Reference book" , "Guide" , "Telephone information service" , "Book listing names of inhabitants, users etc" , "Telephone book" .)