Crossword clues for the word: SISTERSFIRST The word SISTERSFIRST has appeared as an answer to at least 1 crossword clue on different crossword puzzles. Crossword clues for SISTERSFIRST Showing 1 to 1 of 1 results Clue(s) 2017 best seller by twins Jenna Bush Hager and Barbara Pierce Bush about their youth in the White House: 2 wds.