You can use System Manager to view the hierarchy of FlexClone volumes and their parent volumes.
Steps
Click Storage > Volumes.
From the drop-down menu in the SVM field, select All SVMs.
Select the required volume from the list of volumes.
Click More Actions > Clone > View Hierarchy.
Result
Volumes that have at least one child FlexClone volume are displayed. The FlexClone volumes are displayed as children of their respective parent volumes.