I'd like to use, for this specific instance, letter style enumeration [ like a) b) c) ] . I realize that I can nest one enumerate environment in another and the style will change, but I don't want a dangling "1." from the topmost enumerate environment.
For deeper values use also , . Inside LyX you will still see the 1. If you want to change this too, then you'll have to rewrite your LyX layout file.