Where, by touring the land, one may have shot to success (6)

'one may have shot to success' is the definition.
I know nothing about this answer so I can't tell whether this works.

'where by touring the land' is the wordplay.
I cannot quite see how this works, but
'land' could be 'isle' (isle is a kind of land) and 'isle' is located in the answer.
'by' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

Can you help me to learn more?