The most common and most likely answer to this crossword clue is the 6 letter word UNSHIP
U
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S
H
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P
More clues leading to the result UNSHIP
Buddy explains!

The straight part
We know that "Land" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case land = unship.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 UNSHIP mean?
UNSHIP verb- To unload cargo from a ship or other vessel
- To remove an oar or mast from its normal position
- To throw from a horse; to unseat