for instance, i guessed that the word disguised was going to be part of the nina before i had solved 25a. it gave me the D as the first letter.
i've since realised it's not a quote, it's the clue for 8,19 down.
8,19 Dark forces clued around this grid (6,6)
Disguise creates men like them.
very clever yes... no?
btw. have you ever tried the FT, can vary from easy to very hard but usually about the same as the gaurdian (i think they share some setters using different names). you can't fill them in online tho.
http://www.ft.com/life-arts/crossword