A story involving Carroll’s lead girl (5)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

An envelope (‘involving’) of C (‘ C aroll’s lead’) in ‘a’ plus LIE (‘story’). Before you complain about the use of ‘girl’ to define a girl’s name, note that the clue has an extended definition, with reference to Lewis Carroll’s Alice’s Adventures in Wonderland and Through the Looking Glass .