Friday’s solutions:

Across: - 1 Prism. 4 Clapper. 9 Neologism. 10 Heron. 11 Tripod. 12 Pawnshop. 14 Boomerangs. 15 Scab. 18 Evil. 20 Redemption. 23 Affinity. 24 Poseur. 26 Girls. 27 Goose-step. 28 Lookout. 29 Extra.

Down: - 1 Proviso. 2 Isotopes. 3 Maid. 4 Campaigned. 5 Athena. 6 Pyrrhic. 7 Run-up. 8 Unstable. 13 Watertight. 16 Bankrupt. 17 Opponent. 19 Inferno. 21 Inertia. 22 Unesco. 23 Angel. 25 Hope.