Crossword Genius

Reported Thamessider’s cultivated fuzz (7)

Ross

I believe the answer is:

eyebrow

'fuzz' is the definition.
The answer and definition can be both body parts as well as being singular nouns.
Maybe there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

(Other definitions for eyebrow that I've seen before include "facial hair, for instance" , "What's raised in surprise" , "Penthouse, for example" , "something going up doubtfully" , "Facial hair (that can be raised)" .)

I've seen this clue in The Times.
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