Related Clues:

• Water source
• Well driller's target
• Freshwater source
• Ref sent back almost a quid before getting a water supplier
• Water supplier, demanding almost a pound, starts to fill empty reservoirs
• As the Welsh might say, like an aspen where there's water
• Underground source of water
• Rock formation showing a peculiar style, mostly containing iron
• Water-carrying layer of rock
• A lock closed early with some hesitation - it'll hold water
• Way question's gripped retired judge - it holds water
• A question put with hesitation about whether it holds water
• Water-bearing rock formation
• Water-bearing stratum
• Underground water source