Answer: The adverb phrase of the sentence provided is "like a revolutionary".
Step-by-step explanation: An adverb phrase is a group of words that modify a verb, an adjective or an adverb and adds information about where, when, how and why something happened. Moreover, an adverb phrase is usually made up of an adverb and other words; however, a prepositional or an infinitive phrase can also function as an adverbial. In the sentence provided, the adverb phrase is "like a revolutionary", which is modifying the verb "dress" and providing information about the how. Furthermore, "like a revolutionary" contains the preposition "like" and the noun phrase "a revolutionary".