can anyone help with these three clues?
6a) having a hard defensive skin (6,6) -r----/------
28d) one who won't let others enjoy what they have no use for (3,2,3,6) -o-/--/---/-a---r
46a) one can't correct a mistake by others (3,6,4,4,1,5) t--/-r-n-s/-o--/----/-/--g--
thanks in advance for any help.