I'm with fgsitw (post 35).  I'm sure it's a great puzzle and worth persevering but I am horribly stuck, having completed the NW corner.
Is 46 across a word meaning the common people? If so what is the misprint in the definition.  On 25 down I quickly found an 8 letter word meaning prisoner but if the fourth letter of 46a is L then I am wrong.  Please help me on the upset poet.  
A hint on 7 across would also be welcome and provide me with the stimulus to continue. 
I'd like to stay with it so many thanks