Continue; talk at length (4)
(Other definitions for go on that I've seen before include "Proceed" , "Harry Secombe or Spike Milligan, say" , "Continue" , "Peter Sellers or Spike Milligan, say" , "Hired thug" .)
(Other definitions for goon that I've seen before include "Hired thug" , "He's very stupid" , "Silly person - bully (US)" , "Foolish person - thug (US)" , "Sellers for example" .)