clues may be anagrams, cryptic, sounds like, genera knowledge or require some lateral thinking.
7, a rubbish place(8)
8, insect-pin down-why?(8)
38, obtain chinese?(9)
39, insipid car used by a roman here?(9,5)
42, vast wealth increase in size(12)
48, icy deposit(5)
50, cut with an axe in this place?(4,4)