The most common and most likely answer to this crossword clue is the 7 letter word CORTEGE
I've seen this crossword clue in The Times
C
O
R
T
E
G
E
More clues leading to the result CORTEGE
- Fellow soldiers outside get up for procession
- Get wheels in middle for train
- Activity leading to funeral: sense upset in the heart
- Get back into Soul Train
- Sheep carried in basic train
- Get upset in centre of procession
- Train company greet stranger
- Understand about opening heart in solemn procession
- Right to replace students in university procession
- Fabulous bird returning, say, splits case in tube train
Buddy explains!

The straight part
We know that "train" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case train = cortege.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 CORTEGE mean?
CORTEGE noun- A ceremonial procession, especially for a wedding or funeral or following a king.