Mountain lake of a height one on foot can handle (5)
I believe the answer is:
tahoe
'mountain lake' is the definition.
(I've seen this before)
'a height one on foot can handle' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
'height' could be 'h' (abbreviation in geometry) and 'h' is located in the answer.
'one' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
The remaining letters 'te' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for tahoe that I've seen before include "US lake" , "Mountain lake" , "the Nevada/California border area" , "Lake in Sierra Nevada mountains" , "Nevada/California lake" .)