The most common and most likely answer to this crossword clue is the 4 letter word LIEN
L
I
E
N
More clues leading to the result LIEN
- Right to remain head of negotiations
- Lawyer’s right to prolong rest, wanting one
- Armstrong perhaps on the way up? Right
- Diamond back, right?
- Extend student’s penultimate term in law
- Legal right to retain property held by client
- Foreigner deprived of a legal right
- Deception by new right
- Right position of course — north
- Right skinny, by the sound of it
Buddy explains!

The straight part
We know that "some security" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case some security = lien.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 LIEN mean?
LIEN noun- A tendon.
- A right to take possession of a debtor’s property as security until a debt or duty is discharged.
- (possibly obsolete) The spleen.