SOLUTION 673:

ACROSS 1 Cabaret, 4 Romeo, 7 Kiwi, 8 Honduras, 10 Septuplets, 12 Trilby, 13 Pitons, 15 Barbie doll, 18 Toy Story, 19 Wigs, 20 Riser, 21 Newport. DOWN 1 Cakes, 2 Bowsprit, 3 Trolls,

4 Rod Steiger, 5 Marc, 6 Oysters, 9 Dumb waiter, 11 Borodino, 12 Tractor, 14 Oberon, 16 Liszt, 17 Eyes.