Capitals quiz - with a twist

I was helping my Gran the other day with a quiz and I thought it might entertain one or two of those whom read this. So here we are - they are cryptic clues to capital cities around the world. Not necessarily state capitals, but capital cities around the world. That's the disclaimer!

Here's an example:

"Is there a cake in this city?" - Answer "PARIS" (Eiffel cakes... or so my Gran tells me!).

So here you go. I'll put the answers in as people guess them. If you guess them! Also, there are a couple I'm not sure of yet!

1. Former Hearts player follows tin CANBERRA (Juliane)

2. Fix a letter underwater ANKARA (Malc's Mum)

3. 1+1, 2+2, 3+3, 4+4 etc... DUBLIN (Anon)

4. Type of map followed by short greeting OSLO (Malc's Gran!)

5. Two rivers together make this name

6. Escaped mammal

7. Repeatedly give money and leave PAGO PAGO (AMERICAN SAMOA) (Wee Mo)

8. Add this to coffee in France SUCRE (Gizem)

9. Swap D for R and drop S in this Aussie soap EDINBURGH (Wee Mo)

10. Put a parent in a sack BAGHDAD (Anon)

11. Support for a broken arm (a drink) SINGAPORE (George)

12. Could be underfoot SEOUL (Linda J)

13. Catchphrase in "Extras" with mirth HAVANA (Finlay)

14. Norse God using razor TORSHAVIN (Anon)

15. Anagram: A U G C L T G P E A I TEGUCIGALPA (Anon)

16. Neckwear hands over cash TAIPEI (Sam)

17. In a field coming after five but before ten KUWAIT (Finlay)

18. Burial place behind a vehicle KHARTOUM (Linda J)

19. Wee Maureen turns whiter PALERMO (Richard)

20. Organise a wee holiday BUCHAREST (Finlay)

Good luck with that!