Riddle’s answer crossword clue

Are you having trouble finding the answers to Riddle’s answer clue of the Premier Sunday Crossword? Well your search ends here, because our team have found all the answers to today’s Premier Sunday crossword.
I must admit that this clue is not so easy. It took us some time to find the right answer to Riddle’s answer. You already know the answers has 15 letters. If you still cannot find it, here it comes.

Clue: Riddle’s answer
Answer: ITSALLGRIEGTOME
Now you know the answer to Riddle’s answer. It’s time to go back to find the answers to others clues on Premier Sunday July 1, 2018

Wrong answer?
Sometimes the same clue can have 2 different answers or more. For example, the clue “401(k) alternative” could have 3 answers: IRA, ROTHIRA, OGOLKR found respectively on the following crosswords: Penny Dell Sunday (Jan. 28, 2018), Newsday (Jan. 22, 2018) and Eugene Sheffer (Dec. 7, 2017)