Popular name for the machine that randomly selects winning Premium Bonds numbers in Britain (5)
I believe the answer is:
ernie
(Other definitions for ernie that I've seen before include "Premium Bonds selector" , "- (the Fastest Milkman in the West) (Benny Hill)" , "Man - chooses Premium Bond winners" , "Eric's other half" , "___ Wise, d. 1999" .)