Possible Clues:

• Well-eaten in Wonderland
• Sweet, black viscous substance
• New production of Lear etc. is cloying stuff
• Sticky stuff in box possibly left outside a class
• Tree retaining a classical part, which is sticky
• So sweet to have the middle of it a clear mixture
• Electra cast as a tart?
• Well eaten in Wonderland?
• With a mixture of claret, 'e made this sticky sweet
• To start with, just a trace of it will make the French sticky