Mountain gap (5)
![Ross](/clue/static/ross-mug.min.png)
'mountain gap' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for notch that I've seen before include "Make the cut" , "Indentation - step up" , "small score?" , "Indentation, nick" , "V-shaped nick" .)
(Other definitions for pass that I've seen before include "Amatory advance" , "Don't answer a question" , "asked for permission to enter" , "Get beyond" , "Exceed; leave behind" .)