Depends where the clog is. If it is near the outer end it is easy. You could even use a small wire. Alternatively use the syringe and water apply pressure (gentle) and suction. This always worked for me.
(I managed to clog mine quite few times, mainly with vegetables that were not blended or cooked enough)

If the clog is at the other end and the syringe trick does not work then wait a bit the stomach juices may just digest the clog.

M