Question Author
bobbin and geev, let me thank you both for your input. Your suggestions are very plausible. Firstly geev; Taking a printers proof to 'Let it stand' (stet) is to include something in the script that was previously cancelled - This could easily be interpreted as an 'Oversight' as you had mentioned. Secondly bobbins, I admit that it was an oversight on my part to miss out the letter 'a' when typing out Clue No.1 - Apologies. However with the inclusion of 'a' makes your hypothesis very possible too, On the proviso that Overtone is a synonym for Long Breath. Thanks again guys!