Par'hyponoian

Par'hyponoian, from Greek ὑπόνοια hypónoia, "logical assumption", is a logical or thought trope, consisting in the replacement of a second part in a phrase or a text, that would have been logically expected from the first part.

Examples
"Clement Attlee is a sheep in a sheep's clothing."

- Winston Churchill

The pun is based on the unexpected modification of a well-known idiom.

"Former president of Venezuela, Hugo Chávez, died yesterday. Sean Penn actually went down to Venezuela and met Chávez a few times. He's a polarizing figure that a lot of Americans really don't like. Chávez was one, too."

- Craig Ferguson

“A polarizing figure” would have been expected to be said about the president Hugo Chávez.

''Former Vice-president Dick Cheney visited a zoo, where he saw a grizzly bear. There was a powerful moment between the blood-thirsty, ruthless beast with claws and fangs, and on the other side, the honey-eating furry mammal in the cage. ''

”Blood-thirsty beast” would have been expected to define a bear.