The reading for https://www.wanikani.com/vocabulary/濡れ衣 in lvl43 uses the kunyomi reading きぬ (with rendaku) for 衣, and mentions that this reading was taught in a previous vocabulary.
However I don’t see where this reading was ever used in a prior vocabulary involving 衣; the only kunyomi reading ever previously taught was ころも: https://www.wanikani.com/kanji/衣
What are clothes, really? Some people say clothes are the chromosomes (ころも) of your personal style — each garment carries information about your unique identity. Other people say clothes are simply the key to not being nude (きぬ). What do you think?
Both ころも and きぬ mean “clothes,” but these usages are old-fashioned. Also note that the more modern meaning of “coating” or “breading” uses only the ころも reading!