Wordplay in eight clues leads to the answer (which is entered normally) with a
single incorrect letter
Not sure if my clues that I am asking for help with "are of the 8"....... also the crossers I have may not be correct as they might have to be changed in the grid..
12a Smeared with resin, cored and cut the marrow (6) D???HE
14a "Fatal" fruit missing heart, having trouble around extreme points (7) A???L?I
23d For Eminem, maybe stick in a groove, fill EP with old rubbish (8) F?RE????