You are right about your conception.
Clenching or grinding your teeth (bruxism) puts pressure on the muscles, tissues, and other structures around your jaw. Bruxism is the most common factor causing TMJ disorders.
Temporomandibular disorders can come in different forms, basically is a problem when you either experience pain and/or a loss of jaw function.
Do you usually get headache at the temples, sometimes with related pain in the neck, face, and even in the back?