The crossword solution for the term 'Grammy Winner Peter' is Nero, a four-letter word. Nero is the stage name of Peter Nerothin, an American singer, songwriter, and record producer. He has won two Grammy Awards, one for Best Rap/Sung Performance in 2018 and one for Best Music Video in 2019. He has also been nominated for several other awards, including the MTV Video Music Award for Best Hip-Hop Video in 2020.