The phrase "obscure part" refers to something that is not well known or easily understood. It could be a hidden or less famous aspect of something. Full definition
As value investors we sometimes find ourselves in the most obscure parts of the market. (capitalwealthadvisors.com)
Yet, the artist's hands obscure parts of the puppet while handling it, making real - time manipulation difficult. (sciencedaily.com)
If you're into the somewhat obscure parts of arcade history, then you might recall that during the first run of VR amusement tech in the 1990s that Pac - Man VR was a real thing. (arcadeheroes.com)