What’s the difference between a sentence and a clause? (not independent clause)

Hi Herman! A clause is a basic structure. It contains a verb (mandatory) and a subject. On the other hand, a sentence is a unit. A sentence contains one or more clauses in its structure.

I'll leave you this link with some examples so you can better understand! :) https://dictionary.cambridge.org/us/grammar/british-grammar/clauses-and-sentences