The phrase "young intern" refers to a person who is a student or recent graduate working in a temporary job to gain practical experience in a certain field. Full definition
We recently hired a very young intern who just graduated from college. (careerdigital.com)
If you've selected a couple of young interns, you could confirm their employment with you by using this copied job offer letter template. (template.net)
Added to this mix is a very young intern Molly (Evan Rachel Wood) who is attracted to powerful men. (seligfilmnews.com)