Their are no anagrams. I used the hang gliding ref as it could be construed a contributing to or being associated with the solution in more that one way..
I rather rushed into first clue, I revised it as I thought it very difficult to get.
I think that with a bit of lateral thinking and use of logic, a correct answer should be found..
- - - - y - - - or Sea - - - - - -
How to tie it in with the clues ?