5dn. Constabulary admits flipping coin:heads for evil in disguise (8,7).
P - I - O - E - , - - A - - - - (last letter of 7-letter could be E.
Thank you in advance for any help.
Thank you to you and scorpiojo. I would never have worked it out. Goliath was the setter this week and I found the crossword very difficult but maybe it's me!