Possible Clues:

• Water manger
• Container for cattle-feed
• Depression over with first husband out of the way
• With Planck's constant get to the other side of pig's dining arrangements
• Hard to get right in narrow channel
• Hollow between wave crests
• Area of low pressure in the Channel?
• Livestock drinking spot
• Channel in easternmost part of Solent getting turbulent
• River in hard to cut channel