Help Plse

[kamanu15]

19A Blunt foreign individual disappeared across river (11)
18D Tyneside medic visits lad in need of irrigation (4-3)
21D Clothes horse? sort of (5)
27A The swimmer receives pressure treatment (7)

thank you

[MargoTester]

Unvarnished
Bone dry
Habit
Therapy

[bobbinwales]

Well done mar go although I don't get habit?
Kana up do you have letters for your clues....if so next time please include them to give me a chance. Ta