Sales talk in play area? (5)
I believe the answer is:
pitch
I believe this is a double definition.
'sales talk' is the first definition.
(synonyms)
'play area?' is the second definition.
'in' is the link.
(Other definitions for pitch that I've seen before include "To throw; roof slope" , "Distillation of tars" , "lurch about in the waves?" , "bowl" , "Set up a tent" .)