Dutch boat's paperwork officer grabs (4)

I believe the answer is:

koff

I'm a little stuck... Click here to teach me more about this clue!

'dutch boat's' is the definition.
I know nothing about this answer so I can't tell whether this works.

'paperwork officer grabs' is the wordplay.
'KOFF' is hidden within the letters.
However, I am unsure how this is indicated.

Can you help me to learn more?

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