Minute Cryptic

Our definition here is 'documentary maker say', and 'say' is flagging that 'documentary maker' is an example of our answer. Side note: as an appreciator of cryptic clues, hats off to Sean for using 'say' on the surface to describe a person saying something, and in the definition to flag an example. Masterfully done.

This clue's indicators are 'Amputee', 'got past', 'treacherous', and 'heard'. One of these is a quite particular deletion indicator guiding us to delete a certain set of letters from neighbouring fodder and keep the rest. Another is a homophone indicator - we'll need to sound out an adjacent word and replace it with a soundalike. A third is an anagram indicator flagging that nearby fodder is being deceptive or unreliable and will rearrange. And 'got past' is a simple repositioning indicator - take what precedes it and put it past (on the other side of) what follows.

This clue's fodder is 'climber', 'drop', and 'you'. We'll use these words and their letters to construct our answer, as guided by the clue's indicator(s).