The antonyms for the word "most clutched" can be "least held", "barely grasped", or "loosely held". These words suggest that the grip or hold on something is weak or not strong enough. Other antonyms can be "released", "let go", or "freed". These words indicate a deliberate or accidental act of repudiating the hold on something. Another alternative antonym can be "abandoned", which implies a complete cessation of holding onto something. Whatever antonym you use, it conveys that the object is not being held very tightly, and the speaker wants to communicate that the object could be dropped or lost easily.