The most common and most likely answer to this crossword clue is the 6 letter word INSOLE
I've seen this crossword clue in The Guardian
I
N
S
O
L
E
More clues leading to the result INSOLE
- Fresh out of good books, one may be under one’s feet
- Piano stool leg occasionally missing pad under foot
- Fashionable and exclusive part of Oxford?
- Source of comfort for heel contained by fish
- Nasty lesion found beneath foot
- Foot supporter at home only
- Lining up legions no good
- Trainer might have this popular fish
- Part of Oxford where the Olympics once took place, we hear?
- Letters from Britain solemnising part of a 3 Dn.
Buddy explains!

The straight part
We know that "found beneath foot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case found beneath foot = insole.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does INSOLE mean?
INSOLE noun- The inside sole of a shoe or other footwear.