Find fault with the grooves left by mountaineers? (4,5)

'the grooves left by mountaineers?' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'find fault' is the wordplay.
I cannot quite understand how this works, but
'fault' could be 'hole' (I've seen this in another clue) and 'hole' is located in the answer.
The remaining letters 'picks' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?