Concealed field, for short Crossword Clue

 The answer to the crossword clue "concealed field, for short" is HA-HA. A ha-ha is a type of sunken fence that is used to demarcate a boundary without interrupting the view. It is often used in landscape gardening to create the illusion of a continuous field.

The name "ha-ha" is thought to come from the sound of laughter that people would make when they saw someone fall into the ditch.

Ha-has are typically made of earth or stone, and they can be either dry or wet. Dry ha-has are the most common type, and they are simply a ditch that is filled with earth. Wet ha-has are filled with water, and they can be more effective at keeping animals out.

Ha-has are a popular feature in many gardens, and they can add a touch of elegance and sophistication to the landscape.

I hope this helps! Let me know if you have any other questions.