Sunday Telegraph Cryptic 2929

[Four Clubs]

Yet again I am struggling. Could you help, please.
1ac Arrived with something for sale in legendary court (7ltrs)c?????? I think it must be camelot??
9ac English composer turned up with right instrument endlessly p??????
11ac What you're doing that's said to show irritation (9ltrs)c???????d
15ac Specialist medical subject involving oral examinations (9ltrs) ??n?i????
17ac Misrepresentation of stalwarts that's the final problem (4,5ltrs)??s? ????w
25ac Fierce competition making artist copy in a way (3,4ltrs) ??t ???e Art something???
Many thanks. Four Clubs

[mac44]

1a. came lot

[Neveracrossword]

1 Yes, Came+Lot (at an auction/for sale)
11 Crossword - Cross Word.

[Neveracrossword]

17 Last Straw, anagram.

[Neveracrossword]

25 Rat Race, fierce competition. RA, artist +Trace, copy in a way.

[Neveracrossword]

15 Dentistry.

[mac44]

9a, Pu r cell(o)

[Neveracrossword]

9 Purcell, English composer. Up becomes Pu +R, right+Cell(o).

[Flonska]

9a Purcell (Up reversed + R = right + Cell(o) minus o = instrument endlessly)

[Four Clubs]

Many thanks to you all. Hopefully I will be able to finish the crossword now. I still haven't managed to find out how I can give best answers to you all!!! Four Clubs.