Crossword puzzle clue "his output is verse and verse"

His output is verse and verse

In verse, "His cheeks were like roses, his nose like a cherry!"

"And he's ___ healthy in his body and his mind ..." (Kinks lyric)

Hungarian known for his prolific output of mathematical papers

-verse prefix that signifies a collection of every single -verse

Non-verse composition with verse-like language

Baseball player who hit his first home run at age 19 (Mariners, 1995) and another on his 40th birthday (Yankees, 2015): 2 wds.

" . . . his cousins and his ___!": Gilbert