His involvement with the CROSAIRE Crossword began in 1943 when the then editor of the Irish Times accepted his proposal for a weekly crossword in the paper. The first crossword was published on 13 March 1943. Because of its growing popularity, the Crosaire gradually began to appear more frequently, reaching its daily status in 1982, a position that it still holds today.
Over the fifty years of its publication CROSAIRE has become an Irish institution, attracting a huge and loyal following for whom no day would be complete without its mental stimulation, and often frustration. Derek Crozier remarks that ‘It's splendid to think that there are people who from time to time would love to wring my neck.’