The term 'ARTIST'S INSPIRER' can be solved by the crossword solution 'MUSE'. A MUSE is a person who serves as an artist's inspiration. In Greek mythology, the Muses were nine goddesses who presided over the arts and sciences. They were believed to inspire artists, musicians, and writers with their creativity. In modern times, a MUSE is someone who serves as a source of inspiration for an artist, often providing them with ideas and motivation.