Try placing a couple of Bounce sheets in and close up for a while. I used this method on an old trunk which had been stored in a shed and it worked.
Give the clothes a quick soak in a 50/50 vinegar water solution, then launder as usual.
Is it a moth ball smell?
Try this. https://www.bobvila.com/articles/how-to-get-rid-of-mothball-smell/