Times, 25,843.

[red46]

10a, 6lets, ???r?y, Malicious heartless boy, long imprisoned.
15a, 4lets, R?e?, Knot, turnstone etc may feed here.
3d, 2words, 6.5. N?t?r? B?a??, Council supporting spot where bills may be presented.
17d, 7lets, R???c?e, Creatively adapt touching series of song's.
21a, 8lets, ?????s?s, Disco dancing is linked to a blood disorder.

[emeritus]

15a Reef

[factor-fiction]

notice board?

[emeritus]

3 Nature Trail ?

[factor-fiction]

Unless there is a notary board

[sandyRoe]

21 acidosis ?

[sandyRoe]

it is. ^ anagram of disco+is+a

[factor-fiction]

On 17d is there a word after song's or should it just end in songs

[red46]

Thanks everyone for your help.

[factor-fiction]

So what did you settle on for 3d and 17d please?

[Lie-in King]

10a Bitchy - 'itch' (long, in) 'b(o)y' (heartless)

17d Recycle - 're' (on; about) + 'cycle'

[red46]

3d, Notice board,

[Lie-in King]

You had 3d right 1st time, ff - 'board' (council, supporting [in a down clue]) 'notice' (see)

[Lie-in King]

Sorry - 'spot', not 'see' - doh

[red46]

Thanks again Everyone.

[factor-fiction]

Thanks LiK- I wasn't sure about notice board given the R in the stated pattern for the first word.
I haven't worked out exactly how we get recycle from 17d but maybe the clue is not quite complete

[CrikeyMoses]

^
Creatively adapt = DEFINITION
touching = RE (as in 'on/about the matter of:')
series of songs = CYCLE (eg Wagner's Ring Cycle)

[factor-fiction]

Thanks Crikey-Moses- it was the apostrophe in SONG'S that threw me- I assumed there was a word missing after the word

[dannyk13]

Ah, the mischievous apostrophe.