9 down unseen ocean current which can be extremely dangerous to swimmers and surfers (two words) I have rip ?u?????
22 across Section of a cannon behind the bore I have ???e?h
Many thanks tyrepill, oldred and lettlegriff. I was spelling 'breech' breach and I dismissed rip current initially as it is unusual for a word in the answer to be the same as one in the clue. We live and learn!