Making reasonable progress but stuck in bottom right corner.
If I could solve 33ac I feel I could maybe crack the rest.
Trees in Oz start to wither, probed by two holes (7)
I have T—O— — — K —
The K might be wrong (from 13d). For that clue (“Prudent fellow is easily seen as such”) I have “Wisecracker” but can’t really work it all out. “Wisenheimer” also fits my -ise- - - - -e-