5. A butch 'He' doesn't use this (5,3)
9. She dances, lasts until the tise comes in (11)
18. Spa on house in wrap-round style (10) - Sandcastle or beachtowel?
22. Sing, i.e. hum, upon a bass melody (9) - all I can think of is Euphonium, but not sure why.
Sorry should have said - all answers are either instruments in a brass band, structures or items seen on or near a beach, activities to enjoy at the seaside, or items to eat or drink at the seaside.