The term 'in the rear' can be broken down into three crossword solutions: LAST (4 letters), ASTEM (6 letters), and ANAL (4 letters). LAST is an adjective meaning coming after all others in a sequence or series, while ASTERN is an adverb meaning toward or at the stern of a ship. Finally, ANAL is an adjective meaning of or relating to the anus. Together, these three words describe something that is located at the back or behind.