The most common and most likely answer to this crossword clue is the 6 letter word THRUST
I've seen this crossword clue in The Times
T
H
R
U
S
T
More clues leading to the result THRUST
- Push heroin in confidence
- Force hospital into control of self-governing body
- Force one’s way through American street
- Force hospital into consortium
- Without any energy, three use tee for drive
- Force husband to embrace faith? On the contrary
- Husband in credit, showing determination
- Health organisation accepting hard force in argument
- Force husband to be part of faith
- Put forward awkward truths
Buddy explains!

The straight part
We know that "Push" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case push = thrust.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 THRUST mean?
THRUST noun- An attack made by moving the sword parallel to its length and landing with the point.
- A push, stab, or lunge forward (the act thereof.)
- The force generated by propulsion, as in a jet engine.
- The primary effort; the goal.
- To make advance with force.
- To force something upon someone.
- To push out or extend rapidly or powerfully.