Investigative, rather than snooty (4)
I believe the answer is:
nosy
But I can't explain it at all! Could you help me understand?
(Other definitions for nosy that I've seen before include "Inclined to poke into other people's affairs" , "Inquisitive in nasal manner" , "Meddlesome" , "Showing too much curiosity about people's affairs" , "Over-inquisitive" .)