quid pro quo /ˌkwɪd prəʊ ˈkwəʊ $ -proʊ ˈkwoʊ/ BrE AmE noun ( plural quid pro quos ) [countable]
[ Date: 1500-1600 ; Language: Latin ; Origin: 'something for something' ]
something that you give or do in exchange for something else, especially when this arrangement is not official
quid pro quo for
There’s a quid pro quo for everything in politics – you’ll soon learn that.