1: For motivation we are led by a Demon and Frog. (7)
2: Lament the first person heard in good judgment (4,3)
3: Bumps into butcher's display of tongue? (5)
4: Separate Tolkien's monster in the middle of dive (7)
5: Watch Othello, for one, receiving minor criticism (7)
6: Comic's ROM crashed! Small world, isn't it? (9)
7: Threatened males got perfect scores (7)
11: A Gore follows a Ryan (5)
14: Urgently compelled president? Sure - with democratic leader (9)
16: Briefly viewed bigot's heart, opened like a boil (7)
17: Almost reveal Nationals' former identity (5)
18: Original caliph adds brave face to UK/Arab struggle (3-4)
19: Was resident hidden in wild net? (7)
20: Essay about one mathematical function in three volumes (7)
21: Cretins destroyed tank (7)
23: Faith in Osiris, lamentably (5)