The most common and most likely answer to this crossword clue is the 4 letter word HASP
I've seen this crossword clue in The Times
H
A
S
P
More clues leading to the result HASP
- Possesses penny to get hinged plate
- Means of achieving closure as used in Lords & Commons
- Catch consists of plaice, primarily
- Means of securing Hindu leader’s snake
- Catch some piranha species
- Push a spike in part making hinged plate
- Fastener is forced at front of piano
- Is in possession of papa's door fastener
Buddy explains!

The straight part
We know that "Means of achieving closure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case means of achieving closure = hasp.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 HASP mean?
HASP noun- A clasp, especially a metal strap fastened by a padlock or a pin; also, a hook for fastening a door.
- A spindle to wind yarn, thread, or silk on.
- An instrument for cutting the surface of grassland; a scarifier.
- To shut or fasten with a hasp.
- A measure of two hanks of linen thread.