Answer:
Adjective clause: I have never enjoyed
Word modified: movie
Step-by-step explanation:
A clause is a group of words that have a subject and a verb, and that can be independent (when it expresses a complete thought, and thus, it can stand on its own) or dependent (when it does not express a complete thought, and thus, it can not stand on its own). Adjective clauses are always dependent clauses.
Adjective clauses modify nouns (a place, thing, person, animal) and they may begin with a relative pronoun (who, whom, whose, that, or which) or a relative adverb (when, where, or why), however, these words can be omitted, such as it is omitted in the adjective clause.
So, I have never enjoyed is the adjective clause because it has a subject (I) and a verb (enjoyed), it is dependent (it does not have complete meaning on its own) and it modifies, describes or gives further information about a noun: movie.