Nope, still can't see the other 11A. I have 6D meaning 'limitless' and 8D meaning 'without pastimes'. Beyond that, I'm stumped and don't understand the 'in 2 parts' hint.
11A (before alteration) certainly seems to have craved attention and was definitely called much worse things...thanks for a very enjoyable Genius Tramp.
ixion: was the original answer to 11a that eccentric gentleman? I didn't quite get the allusion -- and in the end it didn't matter, but I'd like to know (comes again, I fear, from being out of the country too long).