Bookmakers' slang for odds of 2-1

Carry outside each cold bun7 Was cognisant of4 Novel by William Golding about a group of British boys stuck on an uninhabited island14 Easily charm tribe that'll exchange shells10 American golfer whose seven major championships include the Open Championship in 193211 Nine-sided figure7 Slasher and boss (at time of writing) - foxtrot off!4 16th-century oil on panel painting by Jan Sanders van Hemessen in the Prado Museum in Madrid that depicts a trepanation10