Well, I enjoyed that crossword puzzle very much and completed it all up to the last... the signposted entry in row 2.
Like the 'Last Emperor' was forced to admit his guilt, I feel it incumbent on myself to lay myself bare.
I took it to be speech marks, and it drove me mad!
I thought the 'ditto' symbol was differently shaped, and not superscript...
I have put my foot through the stars and stripes and will be sending the bill to myself!