Clean is about the ending of a relationship for good by Taylor. Although it is a about relationship, she wrote it in a way that anyone can apply to their own life…the ending of anything that can be self destructive for you, whether it be relationships, drugs, alcohol, cutting, etc. Her metaphors in this song tell the tale of going "cold Turkey," and also to her mourning the death of that relationship, where she is eventually "clean" of that "wine stained dress". She lets herself feel they pain through her tears in the form of water references(which are numerous in 1989). Once she is clean, she is not risking going back, no matter how much she misses him. If you listened to all of 1989, you would know that that this was an off and on relationship where they guy would come back and want to try again, only to leave again.
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