All have place name sin the answer
6. Risque invitation from Flanders and Swann (4,4,7,5)
9. Could be spotted in Dresden perhaps (6,6,7)
19. A smart capital present from Scandinavia (6,6)
21. Hamlet on lead? (5,4)
23. Do these open doors in Weymouth?96,5)
Many thanks for any help