I'm not fully sure on the relationship between leggings and the pantyhose tag, though it seems that while they share visual similarities they are treated as completely independent tags. Due to the visual similarity between the two tags, I wonder then if the panties_over_pantyhose tag's concept shouldn't be expanded to cover both pantyhose and leggings. If the expansion is deemed worthwhile, then I think renaming the tag would also be preferable to reflect the more general nature of the tag. This would also likely end the idea of trying to implicate it to pantyhose though.