how to clean other storage on Mac ?

For a quick overview see this Apple article: https://support.apple.com/en-us/HT206996

That said, I'll add 2 things. 1) "Other" designates files that aren't labeled by Spotlight as Music, Documents, System, etc. Spotlight is known to lose these tags so that files that should be tagged as Music or Documents or whatever, wind up in the leftover "Other" category. In other words, you don't have a bunch of "Other" clogging your computer but you do have a lot of files on your computer. 2) if you need to reduce how much stuff is on your drive, the article I've pointed you to is a good start. One thing to keep in mind: except for 3D games, most programs don't use lots of space. Neither do documents. If you need to clear up some space, the biggest bang for your buck is to transfer media files to an external hard drive.