42a - troubledd, perhaps (2, 1, 3) - in a ???
28d - excited (8) - a?i???ed
99a - break (7) - r?p?u?e - I've seen the answer as respite, but I get the u from 75d - tear asunder (for the clue demolish completely 4,7, unless that's wrong, also I get the p from 100d polka for clue old-time dance 5