The phrase "in clutches" can refer to being firmly or tightly held by someone or something. Some antonyms for this phrase could include "free," "released," or "ungripped." Being free from the clutches of someone or something can suggest a sense of liberation or escape. Another antonym for "in clutches" might be "unrestrained," implying that one is not being held back or hindered in any way. Similarly, "unencumbered" or "unconstrained" could be antonyms for "in clutches," conveying a sense of freedom and ease. Whatever antonym is used, it serves to highlight the opposite of being trapped or contained.