1: They say the headmaster should be guided by this (9)
6: Ordered hoop to conserve mass and energy (5)
9: Smuggler participating in arms race? (9)
10: Mugs grabbing one of Satchmo's horns (5)
11: Nothing added to list for early riser (7)
13: Crime's delays? (4-3)
14: It's a plain pastry with a serving of raspberry and some light stuff (7)
15: Fish or insect for captain (7)
16: Scolded, undergo assessment (7)
17: Staying in front, he got moving (2,3,2)
18: Hack gets brainwave to start with: ripen green veggie (7)
20: Surprisingly, neither was in place. (7)
22: Reportedly hoist Jeter of the NY Yankees (5)
23: Suspiciously detain cad -- he may be trying to get into the house (9)
25: Rinse out pine compound (5)
26: Leda overtaken by frenzied satyr -- perhaps debauched? (3,6)