The phrase 'And justice for all' is a popular phrase that has been used in many contexts, including as the title of a 1979 film starring Al Pacino. It is also the title of a song by Metallica, released in 1988. The phrase is often used to express the idea that justice should be available to everyone, regardless of their social or economic status. The three letter answer to the crossword puzzle is 'ALL', which is an acronym for the phrase 'and justice for all'.