Answer:
Metonymy
Explanation:
Metonymy is a rhetorical device that substitutes the name of an attribute for that of the thing meant.
An example is using a suit to represent a business executive.
"you don't have to be an Einstein to ..."
Albert Einstein is a famous scientist and inventor that is regarded as a genius. So the word genius and Einstein are used interchangeably.
That line can be translated as "you don't have to be a genius to..."
