Tory leader mostly tit, judge admitted (4)
I believe the answer is:
bojo
'tory leader' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'mostly tit judge admitted' is the wordplay.
'mostly' means to remove the last letter.
'tit' becomes 'boob' (synonyms).
'judge' becomes 'j' (abbreviation for judge).
'admitted' is an insertion indicator.
'boob' with its final letter taken away is 'boo'.
'boo' going around 'j' is 'BOJO'.
Can you help me to learn more?
(Another definition for bojo that I've seen is " Mayor".)