1: Throw mud at information (5)
5: For motivation we are led by a Demon and Frog. (7)
9: Vicar regularly outdated technology (1.1.1.)
10: Open present yonder (4,5)
11: Finish suddenly, like an oboe? (1, 4, 2, 3, 3)
12: Sort of pale after what one desires gets squashed (7)
13: Struggle with pieces of green apple (7)
16: Heading from the Dakotas to the Little Big Horn, general is waylaid by a person who can look into the future, and backs out (7)
17: Ailment moving one to get nourishment (7)
18: One-time philosophical teaching turned him to classics (13)
23: Introduction of inert ions with mercurial elements (9)
24: Bite and flip over -- one way to win a wrestling match (3)
25: Hoyts odd shops abolish horse mints (7)
26: Long time to the third of June (5)