I have got the answer to 4d but cannot justify it completely-
Getting flat close to Hamburg with prudish girl is a bloomer (7,8)
Evening primrose fits the 'bloomer' definition & prim rose is the
prudish girl.
I can see that G (close to Hamburg) but Getting flat is Evening (also a G)
I am trying to find Tim Moorey's email address to get clarification.
He recently lost his long time checker and this clue may just have
slipped through.