Lovatts Giant Cryptic

Hi I’m attempting to do the giant cryptic in crossword and puzzles collection 133. I’m currently stuck on a few…multiply first number by itself to get back to starting point (6,3) letters I have S???R???A. 67 down (7) little rascal takes the wrong dose when forced. Letters I have I??O?ED. 78 across (9) southern courtyard Ron’s put together for air force units. Letters I have ??U?D???S. Thanks 😊 for any help!