Possible Clues:

• 'With rot, the motor becomes instrumental in the theatre (6)'
• Rot with the motor - that's the drill
• Might this get the liquid out of a carrot?
• Is one driven at last to get the fluid away?
• If there are bits of rot over the motor, this should get the liquid out
• Rot has the engine to get the fluid out
• That's to get the liquid out, or cart it
• If you want to get the fluid out, that's the drill
• That will draw out and draw away at last
• The way to get the fluid away by car at last