The most common and most likely answer to this crossword clue is the 6 letter word DACTYL
D
A
C
T
Y
L
Buddy explains!
The straight part
We know that "foot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case foot = dactyl.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 DACTYL mean?
DACTYL noun- A poetical foot of three syllables (— ⏑ ⏑), one long followed by two short, or one accented followed by two unaccented.