At first I thought it would be an easy one but it turned out to be quite difficult.
I always start by trying to get the theme from the preamble and title. Googling key words from the preamble sometimes gives the game away early and this time searching for “hexagon overlapping circles” gave the 12 letter theme before I looked at any clues.
Very easy straight line clues and the 6 letter words revealed themselves but the 12 letter answers took most of the rest of Saturday!
Good fair clues. I enjoyed this one.