quid pro quoquid pro quo /ˌkwɪd prəʊ ˈkwəʊ $ -proʊ ˈkwoʊ/ noun (plural quid pro quos) [countable] 
something that you give or do in exchange for something else, especially when this arrangement is not officialquid pro quo for
There’s a quid pro quo for everything in politics – you’ll soon learn that.
something that you give or do in exchange for something else, especially when this arrangement is not officialquid pro quo for There’s a quid pro quo for everything in politics – you’ll soon learn that.