Well, that was a nasty affair! Three of these miserable excuses for clues remain and it is only due to a personal sense of pride that I feel the need to complete this grid rather than use the offending paper to light the fire! Anyway I digress....
7d Nasty red mark round bottom of stool (6) ?T???N
10a 3 duly adjusted to include indefinite number as a round figure (8) R?I?N???
3d is assumed to be mini.
I've posted before about what a duff crossword this was. PUNK is John Halpern, who also sets in The Guardian as PAUL, and elsewhere as MUDD. Wish they'd keep him (and ANAX) away from the i !