The tag implication #47139 cuffs_to_collar -> cuff_(restraint) has been approved.

Reason: only kind of cuff that makes sense in context

EDIT: The tag implication cuffs_to_collar -> cuff_(restraint) (forum #345796) has been approved by @bitWolfy.

Hmm, some related tags:
https://e621.net/wiki_pages/5546 hogtied
https://e621.net/wiki_pages/10818 wrist_to_ankles
wrist_to_thigh Only 2 examples, but similar to ankles. Seems legit, but a rare tag.

These 3 often have bindings connected to another part of the body or a suspension, although maybe not on this site.
nipples_tied
clitoris_tied
Not related but funny example: https://e621.net/posts/2862552?q=tied_to_penis :-D Some of these should probably be penis_tied or tied_penis (I forgot which word order is preferred - latter one?).

https://e621.net/tags?search%5Bname_matches%5D=*tied_to*
wing_binding / wing_bindings / https://e621.net/wiki_pages/27523 wings_tied Shouldn't these all be wings_tied?
https://e621.net/wiki_pages/23707 legs_bound_to_collar Oh, definitely the collar tags are related.

Just by looking for related tags, I found a bunch of tags possibly needing aliasing or disambiguation. Sigh...

The tag implication cuffs_to_collar -> cuff_(restraint) (forum #345796) has been approved by @bitWolfy.