Moon clips hold ammunition in place for insertion into revolver chambers. (Wikimedia image)
TLDR: Yes, revolvers use clips, but write them specifically as “moon clips.”
As covered previously, 99 percent of the time the right term for “detachable thing that holds ammunition” is “magazine,” not “clip.” That’s despite “clip” being used instead of “magazine” in about 99 percent of instances in fiction. It’s an easy fix – just write “mag” or “magazine” whenever you get the itch to use “clip” – but there are a few exceptions. One of those is with revolvers.
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The Writer's Guide to Weapons 