Correct spelling for the English word "clenly" is [klˈɛnli], [klˈɛnli], [k_l_ˈɛ_n_l_i] (IPA phonetic alphabet).
The word "clenly" seems to be a misspelling or variant form of the word "cleanly". The word "cleanly" has its roots in the Old English word "clǣnlīce", which means "in a clean manner". "Clǣn" was derived from the West Germanic word "klainaz", meaning "clean" or "pure". Over time, the word "clenly" evolved into "cleanly", retaining its original meaning of doing something in a clean or hygienic manner.