Typical conversation in market (5,8)
I believe the answer is:
stock exchange
'market' is the definition.
(I know that stock exchange is a type of exchange)
'typical conversation' is the wordplay.
'typical' becomes 'stock' (stock can mean typical or cliche).
'conversation' becomes 'exchange' (exchange is a kind of conversation).
'stock'+'exchange'='STOCK EXCHANGE'
'in' is the link.
(Other definitions for stock exchange that I've seen before include "City trading establishment" , "Regulated market for securites" , "Securities market" , "Nasdaq, for example" .)