Excellent puzzle from Ifor that brought a smile to my face
Before I put it away, can I just get clarity on a couple of points ...
4d - Most bitter twist from truth obscuring letter of agreement (6)
I have the answer but just cannot see the wordplay.
The letters that replace the surname - I can fit in the last word of the speaker's most famous quote but it looks odd without the rest of it, which makes me think I'm missing something?
Also, it says the names are symmetrical but, while mine are parallel, they're slightly out of alignment.