You can just query sys.indexes for that, looking for the object_id of your table, a type=1 (clustered), and is_unique=0.
Something like this:
CREATE TABLE YourTable (ID int)
CREATE CLUSTERED INDEX CI_YourTable_ID ON YourTable (ID)
SELECT * FROM sys.indexes
WHERE OBJECT_ID=OBJECT_ID('YourTable')
AND type=1 AND is_unique=0
DROP TABLE YourTable
Cheers!