Sales talk (5)
I believe the answer is:
spiel
'sales talk' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spiel that I've seen before include "Plausible line of talk" , "Salesman's glib patter" , "Sales pitch" , "Glib style of talk associated with salesmen" , "Glib story" .)