The four DANISH composers mentioned in the crossword are Carl Nielsen, August Enna, J.P.E. Hartmann, and Erik BOHR. Carl Nielsen was a renowned composer and conductor who wrote six symphonies, two operas, and numerous other works. August Enna was a prolific composer of operas, ballets, and orchestral works. J.P.E. Hartmann was a Romantic composer who wrote several symphonies, concertos, and chamber music. Erik BOHR was a contemporary composer who wrote works for orchestra, chamber ensembles, and solo instruments. Lastly, the PASTRY mentioned in the crossword is a traditional DANISH PASTRY known as a 'DANISH'.