He he. I had this (probably it is the same) on my ex Honda Accord CL7 (K20A6). It is like cat screaming and it is on 1/3 clutch pedal released (confirm it is like that). If it is - release bearing I was told !!
Nothing to concern about - nothing will happen, and not worth to get out clutch.
I had this mostly when cold, but it was also sometimes in summer (every few days once)...