Sorry to keep coming back - no, honest! - but I'm curious about the cryptic references here to the triply-relevant 6-letter title. Throck suggests a 4-2, and if it's the explosive one I'm thinking of, then it may well be right. But banana (may I call you that?) seems to be suggesting that the D-word has some significance. It has been suggested elsewhere that there is a tendency for setters to play "Guess what I'm thinking", and this one seems perilously close. I've identified the 22 letters without needing to appreciate this particular step, which surely renders it otiose. Oh! maybe otiose is what I'm looking for ...