Lovely! Easy but fun. I've been trying to find groups of 4 words which cycle back on themselves- I've managed one grid like that but now I keep getting stuck! Didn't think to use word pairs- great idea. Maybe you could have a go at fully cyclic groups? (just a suggestion) as you've got a real knack for this! Really enjoyed it, well done great grid :)

Easy but Interesting . Quite difficult to include crossovers though