Race Comment Explainer

Original comment with matches highlighted:

led, headed halfway, pushed along over 2f out, soon and

Matched phrases & meanings

Phrase	Meaning
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Weakened	The horse lost speed and dropped back through the field.
No extra	Did not improve or accelerate when asked.
halfway	The horse was patiently ridden up to the middle point

Summary

The jockey started to urge the horse (hand-riding, not necessarily using the whip).
The horse lost speed and dropped back through the field.
Did not improve or accelerate when asked.
The horse was patiently ridden up to the middle point