Scream when ogre traps recurring character in his wicked lair (6)

I believe the answer is:

shriek

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

'scream' is the definition.
(I know that shriek is a more specific form of the action scream)

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

Can you help me to learn more?

(Other definitions for shriek that I've seen before include "Hikers (anag.)" , "Scream or squeal" , "Short piercing scream" , "A high-pitched shrill cry" , "A high-pitched scream" .)

I've seen this clue in The Independent.

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