Embarrassed as a wool grower? (8)

I believe the answer is:

sheepish

I'm a little stuck... Click here to teach me more about this clue!

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

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for sheepish that I've seen before include "Bashful and embarrassed like woolly creature" , "Embarrassed, looking silly" , "Embarrassedly shy" , "Shy, embarrassed" , "Ashamed" .)

I've seen this clue in the Sydney Morning Herald.

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