Weekend Ft 15216

[HenHen]

13ac -hope a knockout's content with climax (4) - ?e??
14d - not the point on which decision may rest (5-4) - ??I?? ???E
20d - a bitter - sweet introduction to the top classes (6) - ?????A
26ac - persevering with bottom notes from French interior (9) - ??????O?S

help appreciated with explanations
TIA
HH

[bibblebub]

13a: peak
14d: knife-edge
20d: strata
26a: assiduous

[aelmpvw]

13a peak (hidden in clue)

[BlueIce]

13. Peak
14 Knife edge

[bibblebub]

13a: inside ...hoPE A Knockout...

14d: the edge isn't the end of a knife

20d: a+tart+s(weet) reversed

26a: bottom = ASS, notes = IOUS, from french interior = DU inside

[HenHen]

Thanks everyone. Much appreciated