Possible Clues:

• Give
• Give and take maiden, one from the East
• Tell you the rascal is a scurvy rat
• Although I seem to be not all there, I can pass it on
• Tell
• Although I am not all there, I can be a teacher (6)a
• Even though I am not quite all there, I can still teach (6)
• Give one thousand, not the lot
• Convey (information)
• Even though one is not all there, one claims to be able to teach