In just one way, it's underfoot (6)
I believe the answer is:
insole
'it's underfoot' is the definition.
(I've seen this in another clue)
'in just one' is the wordplay.
'just one' becomes 'sole' (I've seen this before).
'in'+'sole'='INSOLE'
'way' is the link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for insole that I've seen before include "Inner part of shoe" , "Padding in a shoe" , "Part of Oxford perhaps" , "Oxford's content" , "support for rambler, perhaps" .)