The answer to the crossword for the term 'Father of Art Deco' is ERTE (4 letters). Erte, or Romain de Tirtoff, was a Russian-born French artist and designer who is credited with creating the Art Deco style. He was a prolific artist who worked in many mediums, including fashion, jewelry, stage design, and painting. His work was characterized by its modernity and elegance, and he is considered to be one of the most influential figures in the Art Deco movement.