Miles, I am also a relative newbie to the Listener. There was a particularly difficult puzzle a few weeks back by a setter who I can't remember but was clearly well known to regulars. Anyhow, that puzzle caused me to download the often-mentioned Chambers App. If you don't have it , it is well worth the modest price. Some of the functionality is so good it feels a bit like cheating. I now try to avoid using except as a last resort but if nothing else, given that some puzzles take me all week, it has spared me carrying to Hardback on my daily commute..