4  !0 in C (3)

 6  Beneficial activity that ends the answers to starred clues (8)

 9  "All ___?" (3)

10 "Every ___ you stake, I'll be watching you" (Police line) (5)

11 "... in order to form a more ___ union..." (7)

13 "... I thought, / ___ my head was dizzy": "Endymion" (5)

14 "___ me to introduce myself" (5)

15 Canada or Mexico (7)

17 "...suddenly appear / Every time you are ___?" (4)

18 "...neither ___ one to another" (Lev. 19:11) (3)

 1  "Blest Be the ___ That Binds" (3)

 2  "--- Charles" (Barkley's nickname) (3)

 3  #1 tune of '65 (9)

 5  "... ___, and Juliet is the sun!" (4)

 7  "Hindsight is an ___ science" (Guy Bellamy) (5)

 8  "And ye are ___ in him" (Col. 2:10) (8)

 9  "How do you ___ relief?" (5)

10 Administrative body (7)

12 Coming near (6)

16 "--- only as directed" (3)