Cryptic crossword clue
Jack abandoning boat and gathering up fish to leave port 6

The most common and most likely answer to this crossword clue is the 6 letter word UNDOCK

I've seen this crossword clue in The Times
U
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D
O
C
K


Buddy explains!

The straight part
We know that "leave port" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case leave port = undock.
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 UNDOCK mean?

UNDOCK verb
  1. To remove (a ship) from a dock.
  2. To remove from a docking station.
  3. To drag (a user interface element, such as a toolbar) away from its fixed position so that it floats freely.

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