FG Crossword

[foxyfarmer]

I'm back again! Still can't get this crossword finished!
10 Certify that the herd is free of disease (6) _ _ _E_T
11 Tackle employed for even distribution (8) _ _R_ _ _E_
21 A slight frost about the chieftain (4) _ _I_
1 Grape-flower vine is a decorative climber (8) _I_ _ _R_A
4 Very disagreeable, just like an animal (7) _E_ _ _L_
6 Deciduous specimen having no needles (11,4) _R_ _ _L_A_ _ _, TREE (I can't think of any 11 letter trees!)
Many thanks for all your help! It's much appreciated!
Foxy

[mahonia]

4 beastly

[mahonia]

1 wisteria?

[Alibobs]

6 Broadleaved tree

[johnalex]

21 Emir (rime <<)

[foxyfarmer]

I now have some more letters for the first three:
10 _T_E_T
11 S_R_A_E_
21 E_I_

[johnalex]

11 Spreader (Tackle = noun)

[johnalex]

10 Attest

[foxyfarmer]

Thanks for that everyone! You've all made my day! That crossword was starting to bug me! 11 seems obvious now, didn't read it as a noun. Anyway, thanks again, I can go to bed now!! Night!