I'm trying to finish off a cryptic crossword. I'm down to the last four clues and I simply cannot figure them out. Can you help with the following clues? I've included the letters I have so far after the clue.
Bent after opening delight (7)
Kept clear of the last of the Mohicans' ground (8)
E_C_E_ _ _
Shade that may go with interior of fold (8)
_ _ _ _ _E_N
Radar device one inserted in ear turned into protection from dropping out (9)
Additional info thanks to overlaps:
The 7th letter of (2) is the 2nd letter of (3), and the 4th letter of (3) is is the 1st letter of (4).
A brief explanation with your answer would be appreciated.