1: Call for help oddly stops (3)
3: Incomplete raw data lies in largely unexplored regions (4,7)
8: Crook skimmed cash register? (3)
9: Bunch of devotees arouse group (3,4)
11: He wrote a bit of poetry! (3)
12: Changes direction with care, as befits a benefactor. (4, 4, 5)
13: Determined attack on a moribund collection (4,3)
14: Gang's in act of relocating (7)
16: Tavern drink for the auditor, one with access to confidential information (7)
17: Enjoy a mud pie and trade it freely (3,4)
20: Princesses's attendant, yawning, laid it out (4-2-7)
23: A hint for the snooker champ? (3)
24: Hammers small rock outcroppings (7)
25: It comes to a point everyone heard (3)
26: Fast times with company cracked high-strung recruiter (6,5)
27: Now Elton heard California's big one (3)