The most common and most likely answer to this crossword clue is the 9 letter word SWINEHERD
I've seen this crossword clue in The Times
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More clues leading to the result SWINEHERD
- Farm worker offers drink in bit of broken pottery
- Prodigal at one time taking strong drink in bit of broken pot
- Woman’s daughter needs small drink at first for farm worker
- Farm worker finds drink in piece of pottery
- I looked after animals when sire sadly died
- I work on farm — wind here’s terrible
- Driver in fields around Whernside
- Pig’s head?
- The woman drinking booze by the road is a farm employee
Buddy explains!

The straight part
We know that "Farm worker" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case farm worker = swineherd.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 SWINEHERD mean?
SWINEHERD noun- A person who herds and tends swine, a keeper of swine (pigs).