Quite entertaining. The grid was fully completed in the morning, but the SE corner yielded after much resistance.
I have entered the solutions, but I'm still stuck on the parsing/references of 14a (Country-style nickname Alice could give either twin?) and 20d (How one might briefly describe the Princess Royal's body?).
Can anybody provide me with explanations without spoilers, please?
Also, I don't understand the use of "actor" in the clue for 12a.