“One bird can’t make a pun, but ___!” Crossword Clue

 The answer to the crossword clue "One bird can't make a pun, but ___!" is two can. This is a pun on the word "two", which can also be pronounced as "toucan". A toucan is a brightly colored bird with a long, curved beak.

The clue is a play on words, because a toucan can make a pun, but a single bird cannot.

Here are some other possible answers for the crossword clue "One bird can't make a pun, but ___!":

Two can play at that game.

Two heads are better than one.

Two birds with one stone.

Two peas in a pod.

Two of a kind.

I hope this helps! Let me know if you have any other questions.