Please Help :) Flowers

[Angleflame]

Flowers and flowers all answers have hint as to their location within the clue

I know there's a lot, but I'm having real trouble with this one. Thank you for helping x

1. African leaders of commonwealth open new government offices(5)
2. Always between two poles of Ironbridge(6)
3. Bet neither turns up regularly in eau de cologne(5)
4. Billy on for some tea?(9)
5. Durban has a European for a right mixup(6)
6. End of kilt torn in notts(5)
7. Five meet a Russian lady(5)
6. Former finalist missed 2018 Australian Open through injury(6)
9. In Asia,was this how he introduced himself to Fay Wray?(6)
10. Indian criminal syndicates conceal drug(6)
11. Local, in best of health, &.....(7)
12. .....located in car park,waiting for Thai(4)
13. One German in the home counties?,No, across the channel.(5)
14. Quiet! Put name in unknown author from the Emerald Isle(7)
15. Suv,Fiji.(9)
16. The big,easy Frenchman has twin characters between his four eyes,reportedly(11)

[cashier]

2 Severn

[cashier]

6 Trent

[Toorak]

7 volga

[Captain2]

1 African river - look at initial letters of the last 5 words

[cashier]

14 Shannon

[pixie374]

14 shannon

[Toorak]

3 Rhine
Alternate letters reversed in clue

[Toorak]

6 murray

[ubasses]

13 Seine

[Toorak]

9 mekong

[ubasses]

12 Kwai

[Toorak]

16 mississippi

[Captain2]

10 Gang (criminal syndicate) + E(cstasy)(drug)

[Captain2]

10 ^^^ should be GangS

[Angleflame]

Thank you all for your help :)

[Captain2]

5 Danube
Change R(ight) in Durban for an E(uropean) and anagram

[Davemano]

11 Welland

[Davemano]

Think the second 6 should be 8, answered at 1849.

[Toorak]

You’re right - well spotted

[Captain2]

All the answers so far have been rivers (flow-ers) but presumably we can have those things that grow in the garden as well?