I don't know that it will be a supported option as it's still not (to my knowledge) documented.
It was put in as a hard-coded in the Clarity side and done for security/vulnerability reasons to help block clickjacking attacks.
However product support have, conditionally and with heavy disclaimers, provided the following advice before that you might try:
1. Stop the app services.
2. Edit the properties.xml file.
3. In the webServerInstance element (for the app services, probably not the nsa/CSA one) add the following attribute and set it to false: useXframeOptions="false"
4. Save the properties.xml file.
5. Redeploy and start the app services.
Hope that helps. I'm no longer with CA myself, so if it doesn't work you may need to reach out to them for further assistance on it.