Did he not hear? Or did he just decide not to help? Or - oh, no, here he comes.
"The tree's a little bigger than I expected." Anchor gestures at it.
"But with two of us, we can just lift and shift that top part to the side of the road, and the caravan can get by." She closes her spellbook after another glance, walks over to the part of the tree she means and begins pushing it, enough so that it shifts a little bit, to indicate that with the mime helping, it would be easy enough to move.

If the mime gets much closer
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Anchor will quietly but forcefully say to him "d̟̪̯̟̽̋̌ ̠͚͔̝̰͑̑̉̉ͣͬͣ͗́ẻ̐҉̥͕̯͍̺ ", a spell intended to leave one dazed and confused for about a minute. Of course, the mime is a professional; he might recover quite quickly or have a counter-charm already prepared. Such things do happen.