To push prospects to a specific HubSpot list from Clay, use the HubSpot integration enrichment:
1. In your Clay table, click "Add enrichment" and search for "HubSpot"
2. Select "Create object" under the Actions section
3. Choose "Contact" as the Object type
4. Map your Clay columns to the appropriate HubSpot contact properties
5. Include the specific list ID you want to add the contact to
The contacts will be created in HubSpot and added to your specified list.