The most common and most likely answer to this crossword clue is the 7 letter word TROTTER
I've seen this crossword clue in The Guardian
T
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O
T
T
E
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More clues leading to the result TROTTER
- Foot of pig or horse?
- Foot of pig, maybe, or tail of giant swine
- Walk unsteadily with end of skewer stuck in foot
- Foot, whose bait drifts downstream
- Extremity of foot on swine?
- Extremely tender animal’s foot
- The baddy — not he who operated as market trader?
- Foot rule taken in by scrap dealer
- Swine on time for part of pig
- Ultimately malevolent scoundrel, a bit of a swine
Buddy explains!

The straight part
We know that "part of pig" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of pig = trotter.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 TROTTER mean?
TROTTER noun- In harness racing, a horse with a gait in which the front and back legs on opposite sides take a step together alternating with the other set of opposite legs; as opposed to a pacer.
- The foot of a pig, sheep, or other quadruped.