15ac Synthesised radioactive transuranic element forerly called unnilseptium .(7) 18ac Figure of speach that employs a non-literal description, e,g. `He was a lion in battle.` (8) 20ac Heavy iron or steel block on which metal is hammered into shape during forging. (5) 22ac Chief of the AEsir in Norse mythology, son of the god of B orr and the giantess Bestia. (4) 24 ac Peg or pin used to join two things together by fitting into holes on each.(5) 27ac Person who assumes a false character or identity in order to deceive. (8) 31ac Japanese poem in three unrhymed lines of 5,7, and moras, often describing nature or a season, popularised by B asho in the 17th century. (5)