Shy sales patter (5)
I believe the answer is:
pitch
This could be a double definition.
'shy' is the first definition.
(thesaurus)
'sales patter' is the second definition.
'pitch' can be an answer for 'patter' (thesaurus). I'm not sure about the 'sales' bit.
Can you help me to learn more?
(Other definitions for pitch that I've seen before include "To throw; roof slope" , "Football ground" , "Fling" , "Timbre" , "Residue of distillation" .)