Englishfor English speakers
conditional
Adjective
—
If something is conditional, it has a condition or requirement.
I made my son a conditional promise that I would buy him a bike if he kept his room tidy.
clause
Noun
—
A clause is a section in a contract or other legal document.
The author's contract contained a clause giving him creative control over the films.
—
A clause is a group of words that usually includes a subject and a predicate. In English, the subject usually comes before the predicate.
The last clause in the sentence is hard to understand without knowing some background.