1a) village between Denny and Bannockburn (8) D-----C
2d) Missionary saint with with ancient shrine in whitburn (6) --N-A-
3d) Soup I stirred to make English word for unco guid (anag) (5) --O-S
5a) Blood sports challenge, inspired by 1925 John Buchan Novel, John (6) -A-N-B
20d) Place where Glen Douglas meets Loch Lomond jars big nerve (anag) (8) -n-e-b-g