Last week’s solution

Across: 1 Protuberance; 7 Spent; 8 Recur; 9 One; 10 Senseless; 11 Defame; 12 Letter; 15 Recollect; 17 Nip; 18 Thorn; 19 Terse; 21 Interruption. Down: 1 Preponderate; 2 Use; 3 Extent; 4 Agreement; 5 Cache; 6 Prescription; 7 Shelf; 10 Semblance; 13 Tense; 14 Jester; 16 Crown; 20 Rip.