Some poems that include synecdoche are Percy Bysshe Shelley's "Ozymandias," T.S. Eliot's "Preludes" and Robert Browning's "The Ring and the Book." Synecdoche refers to an author's use of a part to refer to a whole, or vice versa.
In "Ozymandias," Shelley refers to the "hand that mocked" Ozymandias' cruelty, when it was not merely the hand of the sculptor that created Ozymandias' image but the sculptor himself.
In "Preludes," Eliot refers to the "muddy feet that press / To early coffee-stands." Here, the feet refer to the people walking to get coffee early in the morning.
In "The Ring and the Book," Browning refers to "pert tongue and idle ear / By this, consort 'neath archway, portico." He uses the tongue and the ear to describe two people gossiping with each other.