Daily Telegraph Toughie Friday September 14th 2012

[catsrcool]

17ac Get it ticked off (8) S???H?N? the S is from 17dn which is ??C??? I have SECOND pencilled in.
1dn Little bit of poetry taken in by old lady (7)??????? GRANDMA ?
2dn Space flight succeeds (9,6) ????????? ?O???E

[Oldred]

1d m odic um

[glasman]

17a Could be 'seething'.- get it - see thing

[catsrcool]

Thank you that just leaves:
11ac Retard apprentice keeps closer to Sugar (4) C?R?
With all the crossing letters in place for 1ac Consultant Services have little in common? (7,7) and 2dn Space flight succeeds (9,6) they can only be MEDICAL OFFICER and DEPARTURE LOUNGE but I can't parse either of them.

[Oldred]

second fits with 21a so seething looks good
2d departure lounge

[dannyk13]

11a. Cu r b

[bibblebub]

11a) curb = 'cub' outside (suga)r

[Oldred]

11a cu r b

plane journey comes after departure lounge.

Cannot parse 1a myself

[dannyk13]

2d. Space flight follows being in the departure lounge

[dannyk13]

Medical officer = MO, small part of com(mo)n

[catsrcool]

Thank you all.