1: Recruit criminal with calligraphy (9)
2: Eighteen rounds initially served in golf-club bar (9)
3: On the way back, I had to keep calm and concentrate (7)
4: Hold onto string and file (5)
5: It comes to a point everyone heard (3)
6: Ingrained reaction at home for wildlife (7)
7: Grill when involved in corruption (5)
8: Speak about public relations riddle (5)
13: Contrarily accepted gold slab (5)
16: A period set around one Dostoyevsky character (5)
17: Form of denial mistaken as yin/yang (9)
18: Ten gems Ed sorted and divided (9)
20: Incredibly stoned, taking Intro to Math final (7)
21: One appears at jetty to lead the way (7)
22: So sad coming back, Pops (5)
23: Bleat about delay (5)
25: One who regrets keeping large measuring stick (5)
28: Inflexible yet adjusted (3)