Oh dear.
I was able to fill the grid without too much difficulty but am really struggling despite reading the helpful posts above. As a seal from a Welsh council sandbank I have no Latin or Greek and wonder if this is a barrier. Before I throw in the herring....
In post 39 candledave stated that one of the eight down answers is connected with the theme - we are well into sharing so could someone tell me which one?
In post 50 the ever-helpful Brendan has suggested two anagrams: one I have solved but is he pointing to an anagram of 'oneagains'. If so I can't find one.
Also I'm not seeing any relevance in the puzzle's title. Are we in to Chemistry (another subject that I avoided)
I've got as far as Dylan (post 74) and would like to continue.
Did others find this one difficult?