Tatoeba has the sentence
这个故事仓促地结了尾。
wherein 结尾 is being used as a separable verb. Honestly, before seeing this sentence, I didn't even realize 结尾 could be used as a verb.
CC-CEDICT includes a verb definition for 结尾:
CC-CEDICT 结尾: (jiéwěi) ending / coda / to wind up
But ChatGPT thinks it's unusual:
... In the sentence "这个故事仓促地结了尾," the usage of "结了尾" is a bit unusual. The more common expression would be "故事仓促地结束了" (The story ended hastily). ...
And it has been hard finding examples of 结尾 being used as a verb online, such as at YouDao and Baidu.
My Pleco dictionary ("GF") has a verb definition 结束;完成最后的工作; one example sentence is 这件事由我来结尾。
Question: Is 结尾 a (separable) verb?
Maybe it's worth knowing this rare usage exists, but I shouldn't use it or I'll get marked down.