Stuck on a few, too busy to give them much thought ! Any answers for the following would be much appreciated: 15a : Record number engaged in learning, on reflection (5) ????l
21a: Here's a pad, folded - cushioning this point? (9) ??e???e?d
7d: Become calm and shine a little -that's not hard (6) ?i?m??
15d: About to finish up bed cover (5) ??d??
21d: Still fixed on story one's abandoned (6) ????l?
23d: Line not participating in sombre retreat (4) ??c? back?
Thanks, everyone - the only one I could get by myself was "back", and I would never have worked out "simmer" - there are some brilliant minds out there!!