Friday’s solutions:

Across: - 1 Onomatopoeia. 9 Disturb. 10 Riposte. 11 Norsemen. 12 Grotto. 14 Slang. 16 Influenza. 18 Antarctic. 19 Eyrie. 21 Flabby. 23 Journals. 26 Rubella. 27 Afflict. 28 Praiseworthy.

Down: - 1 Observant. 2 Ovule. 3 Abbreviate. 4 Ogre. 5 Opportune. 6 Inset. 7 Adonis. 8 Fedora. 13 Aficionado. 15 Garibaldi. 17 Normality. 18 Affirm. 20 Ersatz. 22 Amber. 24 Refit. 25 Rake.