In Yorkshire The Clangers causes nightmares (7)
I believe the answer is:
terrors
'nightmares' is the definition.
Although both the answer and definition are plural nouns, I can't see how they can define each other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Another definition for terrors that I've seen is " Great fears".)
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