Telephoned the DM. They've had quite a few calls. The person who deals with this isn't at their desk/not in the office. I left a message with contact details so they may come back to me. You could wait a few days and see if they come up with something.
Thank you for your phone call and apologies that there was a missing clue in this week’s prize crossword. The clue should have read: 4 A thick, rich soup made from shellfish (6)
I have been told that his should not affect the competition as the iSpy total is unaffected if all the other clues have been inputted correctly.