The most common and most likely answer to this crossword clue is the 6 letter word PUSHED
I've seen this crossword clue in Independent
P
U
S
H
E
D
Buddy explains!

The straight part
We know that "Jostled" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jostled = pushed.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 PUSHED mean?
PUSHED verb- To apply a force to (an object) such that it moves away from the person or thing applying the force.
- To continually attempt to persuade (a person) into a particular course of action.
- To press or urge forward; to drive.
- To continually promote (a point of view, a product for sale, etc.).
- To continually exert oneself in order to achieve a goal.
- To approach; to come close to.
- To tense the muscles in the abdomen in order to expel its contents.
- To continue to attempt to persuade a person into a particular course of action.
- To make a higher bid at an auction.
- To make an all-in bet.
- To move (a pawn) directly forward.
- To add (a data item) to the top of a stack.
- To publish (an update, etc.) by transmitting it to other computers.
- To thrust the points of the horns against; to gore.
- To burst out of its pot, as a bud or shoot.
- To strike the cue ball in such a way that it stays in contact with the cue and object ball at the same time (a foul shot).