Sales pitch — or brief example (6)
I believe the answer is:
patter
'sales pitch' is the definition.
(thesaurus)
'brief example' is the wordplay.
'brief' means to remove the last letter (a shorter or briefer version of the word).
'example' becomes 'pattern' (pattern is a kind of example).
'pattern' with its final letter taken away is 'PATTER'.
'or' is the link.
(Other definitions for patter that I've seen before include "Rapid and glib speech, perhaps for sales" , "Line of gab" , "Light repetitive sounds - little feet or rain" , "Spiel" , "Comedian's rapid jokes" .)