2 clues I cannot solve before I tackle the Headmistress Writes quote.
63d Major financial concerns about a very obvious depression (6) C______
67a Maybe Penelope's current heartless sex partner (6) L_____
Also, I have Big Bellied for 6d. Not sure it is right. I have a partial explanation as to how it works but by no means certain.
Dictator's half misrepresented imprisoning Labour leader for "owning a large corporation "
6d first word=dictator
63 "a very"inside major financial concerns (commonly known as the ????)="depression"
67 Surname of a Penelope "current" + "sex partner" less middle letter.
And I have corrected my 6d answer. Got an extra letter that made the 3 letter word clear ( I was thinking about every dictator I had ever heard but had forgotten that charming 70s fella)