Need advice on Primary and Clustering Keys of a table
First I'm assuming that both ID and Type are INT columns.  Second that this is going to be a somewhat active table with a fair number of inserts (and possibly deletes). And last but not least that you aren't going to be pulling a "range" of IDs.  For example you don't need to look at ID 10000-15000.

If so I would create a third column that is an INT identity column.  Make the Primary/Clustered key on it.  Then create a unique key on ID + Type.  By making the new column the clustered key you will avoid any fragmentation problems caused by inserting into the middle of pages and speed up your inserts.  The unique key ID+Type will be used for your queries and will be small enough (8 bytes) that you shouldn't see any issues there.

Last but not least since you are trying to put a full text index on the table you will need a single column, non-null, unique key preferably an integer.  The new column will fit that bill admirably.  (And of course your ID + Type combo wouldn't work.)