The term PART OF SAG can be solved by the five-letter word GUILD. Guilds are organizations of people with similar interests or trades who come together to protect their common economic, social, and political interests. Historically, guilds were an important part of the economy, providing a framework for the regulation of trade and quality standards. In modern times, guilds still exist in some industries, such as the Screen Actors GUILD (SAG), which is a labor union representing over 160, 000 film and television performers worldwide.