Inverness Courier cryptic

[charity-baker47]

Please can I have a bit of help to get me going
1a Having a superior smile(6,6) -i--y ------
15a Firm cultivated moss over an enormous area (6) no letters
24a One may help in certain cases (5,7) l---l -------
16d Fickle Greek character on board (7) --i-b---

[Wharton]

15a cosmos

[mac44]

15a. cosmos

[HowardKennitby]

24A legal something?

[mac44]

16d mutable

[dannyk13]

16d. Mutable

[dannyk13]

24a. Legal advisor?
Ia. shown as 6,6 but you onle show letters for 5,6?

[mac44]

24a. Legal Attaché?

[charity-baker47]

Thanks folks.That helps a lot. 24a first word is certainly legal but I needto get a couple of down clues for second word.
17d Satisfied that it had occupied the whole area (6) -f-l--
21d Old Britons floundering in ice (5) o-e--

[dannyk13]

21d Iceni

[HowardKennitby]

21D Iceni

[Wharton]

21d nicei

[Wharton]

NICEI??? sorry - going for a lie-down now.

[dannyk13]

17d. Filled?

[charity-baker47]

Thank you all for your help. Greatly appreciated. Well spotted dannyK13 1a is (6,6)-i---y ------ I have just worked out 24a as legal adviser. May be back but just 4 to get now

[dannyk13]

1a.Highly amused?

[charity-baker47]

All done! Thank you all.