A good though- probably the right thought - "biog" new to me - although much often is! - seems to be recognised as a shorted form of biography according to my search.
Many thanks yet again
3D is a teaser; I think I have the 5 letter word (assuming that I have 1A correct, though I am unsure about the cryptic part of the clue), but I can't see the 4 letter word nor the whole answer.