Glib talk (6)
'glib talk' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for patter that I've seen before include "idle talk" , "Run with light steps" , "Light quick sounds as of tiny feet" , "Sound of raindrops or little feet" , "Rapid continuous talk" .)
(Other definitions for spiel that I've seen before include "Glib story" , "Salesperson's speech" , "Sales pitch" , "Glib style of talk associated with salesmen" , "Piles (anag.)" .)