13a,catastrophic error unknown in model of system(6)o?????
17a.get promoted-a post in a hundred ?on the contrary(6)?s????
20a.foolish early plan's not right(4)?a??
11d.cut part of book covering recent wrangling(10)p???????g?
14d.critical situation regarding valley and river getting tense(3,5)????l?r?
22d.draught beginning to stir hairpiece(4)s?i?
that the lot thanks very much