Friday’s solutions:

Across: 1 Mutter. 4 Unhappy. 10 Rembrandt. 11 Trace. 12 Trek. 13 Terra firma. 15 Entrepot. 16 Delete. 18 Summit. 20 Marzipan. 23 Obsequious. 24 News. 27 Chafe. 28 Tantalise. 29 Century. 30 Goatee.

Down: 1 Merit. 2 Tempest. 3 Earl. 5 Nature. 6 Antifreeze. 7 Prairie. 8 Envelop. 9 Cetacean. 14 Delinquent. 15 Ensconce. 17 Calumny. 19 Mistake. 21 Predict. 22 Filter. 25 Siege. 26 Halo.