The most common and most likely answer to this crossword clue is the 6 letter word SOWING
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More clues leading to the result SOWING
Buddy explains!

The straight part
We know that "Farm work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case farm work = sowing.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 SOWING mean?
SOWING verb- To scatter, disperse, or plant (seeds).
- To spread abroad; to propagate.
- To scatter over; to besprinkle.
- The act or process by which something is sown.