Late to this, so don't know if anyone still out there.
Finished BLH corner, stuck elsewhere.
38d Japanese family crest encapsulating identity (5) ????N
24d Possible to express painted porch picture (8) ??????LE
6a Shame! Archetypal dog trick backfired (6, 2 words) SIT BOY ?
8d Frenchman held up in operations (7) ???N?R?
25a Mark has eight of these being confident when cycling (4) ??E?
As always any help appreciated