Cause of nightmares? crossword clue

Are you having trouble finding the answers to Cause of nightmares? clue of the Universal Crossword? Well your search ends here, because our team have found all the answers to today’s Universal crossword.
I must admit that this clue is not so easy. It took us some time to find the right answer to Cause of nightmares?. You already know the answers has 11 letters. If you still cannot find it, here it comes.

Clue: Cause of nightmares?
Answer: SLEEPFRIGHT
Now you know the answer to Cause of nightmares?. It’s time to go back to find the answers to others clues on Universal January 7, 2019

Wrong answer?
Well some clues might have different answers. For example, the clue “Mortgage alternative” can have 2 answers: RENT, LEASE found on the these crosswords; Washington Post (Jan 25, 2017) and USA Today (July 18, 2012).