Solution to 'Knock-Knock' by Torquemada

 Knock-Knock by Torquemada - SOLUTION

NOTES
Some answers  are entered as anagrams.

Across: 15. rev Nonsense Songs, Preface 'He wears a runcible hat': 19. Rand: 23. Hamlet I 1, 166: 25. Lion: 26. Love's Labour Lost, IV, 1, 79: 28. Peer: 44 & 48. Lay about it. 53. The two Keans.

Down: 7 rev. & 5. Mote: 10. Lion: 18. Br. around lea: 21. I'm in DS, Del segno: 27. Francis Thompson, Mistress of Vision. XIII: 36. Tut(or): 41. D-yes: 43. Ancient Mariner, II: 45. rev Chick-pea, peahen: 50 & 47. i.e. poached rat.