1: Tar mess contaminated rivers (7)

5: Child can be heard getting out of bed at dawn. (3, 2)

7: Emergency room stocks one sensitive organ (3)

8: Believer in esoteric powers is joining quasi-religious group in October (9)

9: Consumed and digested tea (3)

10: Sound frequently killed (5)

12: Approaching related band, apparently (7)

1: Walesa still embodies how Nobel Laureates soar? (3)

2: Shock with exclamations while mounting horse (9)

3: That woman bit law enforcement officer (4)

4: Rue loss of rare bird (5)

6: Central matter for physicists luncheon: rocks releasing hydrogen (7)

8: Ring around Louisiana and part of Florida (5)

11: Get into the archeology scene. (3)