31a To run away would be the last course you say (6)
I have ?n?n?t. All I can find to fit is unknit or unknot, neither of which is a satisfactory answer)
22d Pull to unknot the string and muck everything up (7)
I have ?o???t? (assuming 23a is goes down??)
14a To wit, no man is allowed to enter (6). I have na??l? which I think is namely (fits with 'to wit' but how about the rest of the clue?