Honestly I would not do the master’s now. If you’re going into medicine it would be difficult to quantify any advantage it would give you at this stage, unless you planned on going into academic medicine. If you are set on medicine, you don’t need the master’s to get in and - apart from academic medicine - you’ll not be in many situations where that knowledge will benefit you directly.
Given that you do seem to be putting medicine off it does make me wonder what you have actually been doing to prepare for medicine during your degree. Are you treating it as something of a given that will go into it? If so, what clinical experiences have you gained to help explore and test your motivation for medicine.
Cleaving to academia if you’re wanting a highly practical career does not send the best signals that you’re ready to commit to medicine. A masters will do little to prepare you further for it, regardless of whether it has clinical in the title. It’s a huge amount of money and time to commit to something that you may never use. If you’re planning on applying to medicine this autumn, this will not impress graduate entry medicine admissions who are looking for evidence of commitment to medicine. Unless you have a lot more that you’re not telling us, they would be potentially looking askance at the person who appears to be zigzagging.
Be cautious with this. And do examine your own motivations as well. If you’re chasing prestige, medical schools don’t care. If you’re wanting to study clinical neuroscience, do you really want to do medicine? A master’s is a commitment in itself and one you can’t take back later. You may regret using up your master’s funding now if you did pursue a medical career and find that another one would have been better suited to you. I think you need to make up your mind.