cosmologist Stephen (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
hawking
(Other definitions for hawking that I've seen before include "Physicist" , "Falconry - "Brief History" author" , "clearing his throat noisily" , "Cosmologist attracted to 6 [BLACKHOLE] s" , "Peddling" .)