2463: Tongue twisters
The unclued lights are of a kind and are entered in the grid in a thematically appropriate manner. Across 11 Alpine mineral popular in pasta (7) 12 On the radio, transmit pitch at sea (5) 14 Mostly irrational, a section of holy book (4) 17 Yam in dough, recipe also from east (9) 20 Senorita