The term 'Conductor Lukas' refers to the German conductor and composer, Hans-Peter Lukas. He is best known for his work with the Frankfurt Radio Symphony Orchestra, where he served as chief conductor from 1989 to 1997. He has also conducted numerous other orchestras, including the Berlin Philharmonic, the Vienna Philharmonic, and the Royal Concertgebouw Orchestra. His repertoire includes works by Beethoven, Brahms, Bruckner, Mahler, and Wagner. The crossword solution FOSS refers to his work as a composer, which includes several operas, symphonies, and chamber music.