Crossword Genius

That lady's costume sounds somewhat shaggy (7)

Ross

I believe the answer is:

hirsute

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'shaggy' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for hirsute that I've seen before include "Furry" , "Unshaven" , "Covered with hair" , "Hairy and shaggy" , "covered in hairs" .)

I've seen this clue in The Irish Times.
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