The most common and most likely answer to this crossword clue is the 7 letter word IMPOUND
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result IMPOUND
- Appropriate money, one million up front
- Seize the little devil 'Arry
- One quid to bag millions? Shut up!
- Appropriate admission by poet?
- Appropriate for poet to admit who he is
- Pen note about poet
- Appropriate introduction from Ezra
- Seize contents of limo and crush
- Confiscate one million quid
- The setter’s bash is appropriate
Buddy explains!

The straight part
We know that "Seize" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case seize = impound.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 IMPOUND mean?
IMPOUND noun- A place in which things are impounded
- A state of being impounded
- That which has been impounded
- Amounts collected from a debtor and held by one with a security interest in property for payment of property taxes and insurance
- To shut up or place in an enclosure called a pound
- To hold back (for example water by a dam)
- To hold in the custody of a court or its delegate
- To collect and hold (funds) for payment of property taxes and insurance on property in which one has a security interest