You can edit clinical annotations in InSilico DB in the clinical annotations window. Click the "Show-Edit clinical annotations" button for the dataset of interest.
Choose the annotations version you want to edit, note you can not change the annotation of someone else but you can save them as a new version under your name
Select a version and click the "Edit Clinical annotations button"
You can now edit the annotations with a variety of tools ("delete column", "duplicate column", "search and replace", etc... ) all these tools work and become active when a column is selected. Alternatively you can double click fields or header titles to start editing them.