César —, Liège-born composer (6)

I believe the answer is:

franck

(Other definitions for franck that I've seen before include "Cesar ---, Fr. composer" , "Belgian-born French composer, d. 1890 - German-born American physicist, d. 1964" , "Cesar ___ , Belgian-born French composer, d. 1890" , "He scored" , "Cesar --, Belgian composer" .)

I've seen this clue in The Times.

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