Related Clues:

• Deminish, lessen
• Make smaller for lenses
• Decrease, diminish
• Grow smaller or less
• After half a century, get there in Germany and don't make so much of it (6)
• There's not so much E over N here
• Belittle what you get in 25 down, by the sound of it
• Moderate teaching unit, so it's said
• Press for a reduction?
• River in the end produces a drop
• Lower iron, perhaps?
• Reduction of a sort initially in order
• Become less
• As in formal order for iron?
• Tone down German city involvement with the fifty others