1: Eleven in succession? (3,5,7)
4: Height is equal to three-fifths of the first one (3)
6: Glint of silica in neat crystal (5)
8: A sample makes sense (5)
10: Ensign's blathering is beyond Saudi leader with oil deposits (5 3 7)
12: Bumped into yours truly at junction (3).
14: Tender translator of runes (5)
15: Notes spent in Germany (5)
17: In fear of wheat head (3)
19: Rolling stones and moss again appear in Milton's work (6,9)
22: Year inside for undone expert (5)
23: Children nicely holding back secret (5)
24: And not in town, ordinarily (3)
25: Queen forced to meet irate nation? (5,10)