Possible Clues:

• Kin of chloroform
• A great composer?
• Colourless liquid used as a solvent
• Preoperative delivery, once
• There now, that will put you to sleep
• That's enough to put one - or three - to sleep
• Clear sky only a little before the rain
• Was said to fill the space and does put one under
• There this can make one not all there
• There one may be made to be unconscious