Last 3 or I'll be awake all night!
2D Mostly 17 across will get one fired (7) Probable letters are H - - - E - T
Ans to 17A is HOT. Two related answers INFERNO & CREMATE have 'burns' in the clue.
3D Tie up the Muslim (4) R - - -
10A With two in the middle, are you on to be too old? (7) O - - - - - N