The figurative language used on the sentence is a simile. A simile is a figure of speech in which two things that have no similarities are compared in order to create a more interesting description. In the sentence action is compared to a broken accordion in which the similitude will be that both are wrong, the action is not going to plan and a broken accordion does not sound as it is supposed to. The key word to understand a simile is the use of the word like, and any other synonyms.
