Baa-Baas' mindless followers? (5)

I believe the answer is:

sheep

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

'mindless followers?' is the definition.
(sheep can mean an unquestioning follower)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for sheep that I've seen before include "Woolly ruminants" , "Dolly or Shaun" , "Woolly animals" , "Farm animal" , "One lacking initiative (but better than a goat?)" .)

I've seen this clue in The Telegraph.

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