The most common and most likely answer to this crossword clue is the 10 letter word BRIDESMAID
I've seen this crossword clue in Financial Times
B
R
I
D
E
S
M
A
I
D
More clues leading to the result BRIDESMAID
- Bishop is admired after wrestling important wedding guest
- Going after leader on bend, dash is admired in perennial silver medallist?:
- One holding up the train?
- One getting cross about debris strewn around before wedding party?
- Train in front of her travels miles ahead initially – try to catch it?
- Attendant in strange dream is in command
- Girl holding up train?
- Intercepting express, criminal is armed, one holding up a train
- Union supporter trips in British Museum – help needed
- British disarmed revolts, including one person holding up train
Buddy explains!

The straight part
We know that "Train in front of her" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case train in front of her = bridesmaid.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 BRIDESMAID mean?
BRIDESMAID noun- A woman who attends a bride during her wedding ceremony, as part of the main wedding party.
- (entertainment) A person or team that perennially finishes well, but never first.
- To act as a bridesmaid for; to attend a bride during her wedding ceremony.