1 knowing importance of boxers [9] ???w?i?h? - thinking flyweight due to clue 2
2 green material [4] if flyweight right i've got l?w? so thinking lawn ?
3 the way studio became more majestic [9] ?t?t????? - stateroom or statelike ?
4 article in room of university official [4] ???n - 2nd letter could either be k or o depending on stateroom, statelike etc