Bug in sleeping place very unpleasant (7)

I believe the answer is:

bedevil

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But I can't explain it at all! Could you help me understand?

(Other definitions for bedevil that I've seen before include "Torture" , "Cause continual difficulties" , "Throw into confusion" , "Vile bed (anag.)" , "torment" .)

I've seen this clue in The Sun.

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