The most common and most likely answer to this crossword clue is the 6 letter word DURESS
I've seen this crossword clue in The Times
D
U
R
E
S
S
More clues leading to the result DURESS
- Line up outside initially under coercion
- Coercion to get you in gear
- Force of habit restricting you ultimately
- Force union leader to wear frock
- Pressure has Don going round the bend
- Squeeze you into outfit, twisting your arm
- You reportedly wore frock under this, reluctantly perhaps
- Force second of nudists to wear clothes
- Pressure bandage applied round top of ulcer
- Force you finally to put on female garment
Buddy explains!

The straight part
We know that "Coercion" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case coercion = duress.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 DURESS mean?
DURESS noun- Harsh treatment.
- Constraint by threat.
- Restraint in which a person is influenced, whether by lawful or unlawful forceful compulsion of their liberty by monition or implementation of physical enforcement; legally for the incurring of civil liability, of a citizen's arrest, or of subrogation, or illegally for the committing of an offense, of forcing a contract, or of using threats.
- To put under duress; to pressure.