Baseball Hall-of-Famer Banks (5)
I believe the answer is:
ernie
'baseball hall-of-famer banks' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ernie that I've seen before include "It picks Premium Bond winners" , "Eric's other half" , "Guy" , "Sergeant Bilko, for one" , "Boy" .)