Impresario associated with Gilbert and Sullivan (5,5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
doyly carte
(Other definitions for doyly carte that I've seen before include "Impresario of Savoy operas" , "Impresario for Gilbert and Sullivan" , "Richard -- --, impresario who presented G&S" , "G and S operetta company" .)