5d) theoretically, propane is unstable (2,5) O? ????R
16d) It's being attacked below tree at end of drive (5,4) ????R ???E
20a) Show obvious pleasure when old peer returns clothing (5) ??O??
25a) A couple of males tucked into wine, relaxing in this?(7) ????R ???25d) 25d) Big strong male, 50, provided shed (5) ????Y
A help greatly appreciated