Mixed bag, this, three cracking clues, three I can't parse
The good ones:
3d Pleased as Punch, but moment was fatal (7,2,5)
4d Shorten what's found behind dog (7)
14d Change around to raise cooker (9)
Now the unparsed!
9a Nameless deserted plant (4)
23 Plotting to get rid of half of China? (4) (Not even sure I've got this right - I have a well-known type of China)
6d Aim to access where keeper is? (9) (I'm puzzled by the "access", but I suppose it might just work)
Any hints on the last three?