An AR-15 uses a magazine, not a clip.
Yes the Garand uses a clip, but there is a difference, the word are not inter-changable.
You can keep neckbearding it all you want but usage is the key in any language and words DO become different things with that usage. It certainly isn’t something to go pontificating about.
And then you can reload a mag with a clip, like with my Mosin Nagant rifles. 5-round stripper clip feeds right into the fixed mag.
People, and especially newbies, should forget the word “clip” exists and just use “mag”. They will almost always be right.