The Old Mariner is a character from the poem 'The Rime of the Ancient Mariner' by Samuel Taylor Coleridge. The poem tells the story of an old sailor who has been cursed with a supernatural punishment for killing an albatross. The Old Mariner's job is to sail the seas and tell his story to anyone he meets. The crossword solution for the term 'Old Mariner' is 'TAR', which is an acronym for 'Talesman of the Ancient Realm'. This acronym refers to the Old Mariner's role as a storyteller, travelling the seas and telling his tale to all who will listen.