Set up sales talk (5)
I believe the answer is:
pitch
This clue is a double definition.
'set up' is the first definition.
(synonyms)
'sales talk' is the second definition.
(synonyms)
(Other definitions for pitch that I've seen before include "Degree of intensity" , "Level of intensity" , "bowl" , "waterproof coat" , "Many games require it" .)