11 Across - Inability to stand on one's two feet through being thin (8)
???nless
15 Down - Where the head is religious (6) ?e?p??
20 Across - Depression is necessary for effective use of the keys it holds (5)
P???o
22 Across - Favour little flower, perhaps (7) R???T??
17 Across - Well, he won't show much interest (4) ?o??