I'm afraid it's even more complicated than magistra describes, because some of the clues also have an incorrect letter (hint, hint). 31ac is not an anagram of "a bare tree", although it does contain an anagram of part of this phrase. For 25dn, I suggest you look up the second word in Chambers, as it has some less well known meanings - the wordplay is pretty obscure for this one, and I think you are best off trying to match the definition first.