unity how to remove clones code example

Example 1: delete all clones unity

var clones = GameObject.FindGameObjectsWithTag ("tag");    
foreach (var clone in clones) {
		Destroy(clone);
    }

Example 2: how to destroy clones in unity c#

GameObject cardClone = Instantiate (Cards [i], new Vector3 (xVal, yVal, zVal), transform.rotation) as GameObject;         Destroy(cardClone);