Clue is "Caribou, note, trudging in flipping grass (8)"
trudging is the extra word, and I reckon answer is REINDEER
=RE(note)+IN+DEER(flipping grass). If you could make REINDEERS fit the clue (possible plural of REINDEER), which it could be, since Caribou may also be plural, then (8) might be a misprint. Hope that makes some sort of sense? I can't make REINDEERS fit the wordplay.
The similar thing seems to have happened at 29A. The clue is Stop a huge racket (5). I've put the answer down as abate (with huge being the extra word) a bat would fit in with the clue but where does the extra e come from in the wordplay? There must be something in the preamble to be worked out for these strange clues.