Title-holder excluding a single Tory leader (7)
I believe the answer is:
baronet
'title' is the definition.
(I've seen this before)
'excluding a single tory leader' is the wordplay.
'excluding' becomes 'bar' (bar can mean excluding or except).
'a single' becomes 'one' (a single thing - only one).
'leader' says to take the initial letters.
The first letter of 'tory' is 't'.
'bar'+'one'+'t'='BARONET'
'holder' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for baronet that I've seen before include "Titled man" , "Minor title" , "Member of the British order of honour" , "Lowest British hereditary title" , "Hereditary knight" .)