1: Half of them should have had an idea (7)
2: Warning! The French return to take up weapons.(5)
3: Rip apart and mostly reject old ballplayer (9)
4: Tweak with wrong end of a pin (3)
7: Eric, having set off, repeats something memorized (7)
9: Tart returns, filled with energy, to provide some special entertainment (5)
11: Right, turn right to play with robot (3)