The most common and most likely answer to this crossword clue is the 5 letter word RIVET
I've seen this crossword clue in The Times
R
I
V
E
T
More clues leading to the result RIVET
- Entrance has pollarded hedge
- Firmly fix hedge, trimming the top
- Drive-thru screens are fascinating
- I run up and check PIN
- Roger and I examine a short metal bolt
- Fix support for pot after front falls off
- Pin I check under top of roof
- Arrest ex-doughboy on Rhode Island
- King I check and prevent from moving
- Direct one’s attention on all but the top of hedge
Buddy explains!

The straight part
We know that "PIN" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pin = rivet.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 RIVET mean?
RIVET noun- A cylindrical mechanical fastener that attaches multiple parts together by fitting through a hole and deforming the head(s) at either end.
- Any fixed point or certain basis.
- A light kind of footman's armour.
- To attach or fasten parts by using rivets.
- To install rivets.
- To command the attention of.
- To make firm or immovable.