Possible Clues:

• Debasement of grown-up needs mate finally helping
• Watering down of grown-up allowance, including wine ultimately
• Grown-up with ecstasy to share out, mixing with inferior stuff
• Corruption of grown-up portion, with Ecstasy in it
• Debasement of drug in grown-up share
• Most state power ends in toadying and corruption
• Corruption of European in indecent allowance
• Mature person helping to restrict onset of environmental pollution
• Addition of contaminant let loose in a time span
• Debasement of the French overcome by change