Puzzle 18

Not concrete, conceptual

Fahrenheit 451, Martian Chronicles author Ray __

Long-necked lizards with non-fatal venomous bite

Someone aged between 20 and 29 is in their __

Music festival created by rockers Slipknot in 2012

Neil Simon play and 1967 film: __ in the Park

Hurrying, scuttling like a bug

Lord __ Windsor, Prince Edward's youngest son

__ reaction; severe response to insect stings

Traditional UK Christmas dinner veggie: __ sprouts

Interrupts, breaks someone's concentration

Invalidate, disallow, e.g. a ruling