One way to end up below Arsenal? (10,4)

'end up below arsenal?' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'one way' is the wordplay.
I cannot really understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'way' could be 'line' (line is a kind of way) and 'line' is found in the answer.
This explanation may well be incorrect...

'to' is the link.

Can you help me to learn more?