I have just realized that I got ahead of things in my earlier message. Slip of the finger, I fear.
I'm now down to my last three :
54A - In such a position, told the top man what to do (7)
R???I??
51D - Woman is a square - one to be avoided (4)
???E
&
55D - My joy with evil finally vanquished (3)
??E
For once, I'm reasonably happy with the letters provided.