Harvey's presence on the show is sure to hold a ton of promise for Season 4, especially because it means that Claire officially has someone in her corner to help her get a leg up on her husband (which, spoiler, is going to be very important to Claire's #goals this season!).
Independent clauses can stand alone as sentences. To be independent, a clause must contain a verb and asubject and not begin with a subordinating word or phrase.
Knowing how to distinguish a dependent clause or a phrase from an independent clause will help you to use punctuation correctly and construct proper sentences. A dependent clause or a phrase can not stand alone as a sentence. It is therefore dependent on other words being added to it to create a sentence.