Sure! Let's break down the word "enthusiast."
Enthusiast (noun): A person who has a strong liking or passion for something. They are very excited about it and often support it actively.
While "enthusiast" primarily refers to someone who is very passionate about something, it can also imply a person who supports a cause or activity fervently.
There aren't specific phrasal verbs that directly relate to "enthusiast," but you might use verbs like "get into" or "take up" which can imply developing an enthusiasm for something. - Example: "She really got into photography last year."
An "enthusiast" is someone who loves and supports a particular interest or activity very passionately. You can identify them by their excitement and involvement in what they love.