Race Comment Explainer

Original comment with matches highlighted:

handy, led home turn, soon pushed along and ed last, n, ridden 2 out, headed last, run-in

Matched phrases & meanings

Phrase	Meaning
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Challenged	Attempted to overtake another horse.
home turn	This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
No extra	Did not improve or accelerate when asked.
Handy	Running very near the leaders (usually 2nd, 3rd, or 4th).

Summary

The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Attempted to overtake another horse.
This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
Did not improve or accelerate when asked.
Running very near the leaders (usually 2nd, 3rd, or 4th).