The most common and most likely answer to this crossword clue is the 9 letter word TRAVELLED
I've seen this crossword clue in The Daily Telegraph
T
R
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More clues leading to the result TRAVELLED
Buddy explains!

The straight part
We know that "Moved along a course" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case moved along a course = travelled.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 TRAVELLED mean?
TRAVELLED verb- To be on a journey, often for pleasure or business and with luggage; to go from one place to another.
- To pass from here to there; to move or transmit; to go from one place to another.
- To move illegally by walking or running without dribbling the ball.
- To travel throughout (a place).
- To force to journey.
- To labour; to travail.
- Frequented by travelers.
- Experienced in travel.