Crossword clues for the word: SIGNATURE The word SIGNATURE has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for SIGNATURE Showing 1 to 9 of 9 results Clue(s) ___ tune (theme song) """U. S. Grant,"" i.e., at the bottom of a letter" Autograph Bottom line contents, often Contract closing Endorsement is rejected by Midge Ure Identifying feature of soldiers returning to the great outdoors (9) It may be added to the cast John Hancock.