quid pro quo
Pronunciation:
/ˌkwɪd.pɹəʊˈkwəʊ//ˌkwɪd.pɹoʊˈkwoʊ/noun
Definitions
Something which is understood as something else; an equivocation.
Substitution of one drug for another.
Something which is offered or asked for in exchange for something else.
A usually non-monetary exchange transaction, or series or process of exchange transactions.