Possible Clues:

• Moderate in effect
• How would Dylan Thomas not have his father go into that good night?
• Soft tranquil life starts in heredity unit
• Mild-mannered man drained lake
• Merciful — grub
• Kind of heathen, one to be avoided
• Clement Attlee ultimately supporting fellow Liberal
• Kind that may help angler catch fish
• Good-natured evangelist has no visa
• Kind of information outlet