The most common and most likely answer to this crossword clue is the 4 letter word JAMB
I've seen this crossword clue in The Times
J
A
M
B
More clues leading to the result JAMB
- Post pack for audition
- Post or stick, did you say?
- Post to get stuck in the auditorium
- Post “Inoculation saves millions”
- Post spread by word of mouth
- Shot protecting leader in military post
- Post stuff to the auditors
- Picked up stick or doorpost
- Crush end of thumb in doorpost
- Wedge key behind post at side of door
Buddy explains!

The straight part
We know that "Post" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case post = jamb.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 JAMB mean?
JAMB noun- (interior decorating) Either of the vertical components that form the side of an opening in a wall, such as that of a door frame, window frame, or fireplace.
- Any thick mass of rock that prevents miners from following the lode or vein.
- To fix or attach a jamb to.