The term "clamp down on" implies putting an end to something forcefully. However, there are several antonyms to this phrase that connote a more relaxed approach. For instance, "let go of" denotes allowing things to go naturally without holding tight. Similarly, "ease up on" means reducing the pressure on something. Another possible antonym could be "liberate" which suggests giving freedom to people or things. Alternatively, "facilitate" refers to making things comfortable or smoothing out the process of things. Using antonyms of "clamp down on" implies a softer and gentler approach for managing or controlling issues instead of harshly forcing them.