The term 'Galleria Filler' is a job description for someone who works in an art gallery. The crossword solution for this term is 'ARTE, ' which is the Italian word for art. This job involves filling the walls of the gallery with artwork, such as paintings, sculptures, and photographs. The Galleria Filler is responsible for selecting pieces that will be displayed in the gallery, arranging them in an aesthetically pleasing way, and ensuring that the artwork is properly cared for.