Here are some possible explanations:
* Misspelling of "cleave": "Cleave" means to split or divide something. It can be used as a prefix, as in "cleavage," which refers to a split or division.
* Misspelling of "clad": "Clad" means covered or clothed. It can be used as a prefix, as in "cladded," which means covered with a specific material.
* Foreign language prefix: The prefix "cle" might exist in another language. It's possible that you encountered it in a word from a different language, such as French or German.
If you could provide more context, such as the word where you saw the prefix "cle," I might be able to give you a more accurate answer.