Race Comment Explainer

Original comment with matches highlighted:

led until 1st, chased leader until pushed along home turn, tailed soon after,

Matched phrases & meanings

Phrase	Meaning
pushed along home turn	The jockey started urging the horse for an effort as they entered the final straight.
tailed off	A definitive statement that the horse was finished and effectively out of the race
Weakened	The horse lost speed and dropped back through the field.

Summary

The jockey started urging the horse for an effort as they entered the final straight.
A definitive statement that the horse was finished and effectively out of the race
The horse lost speed and dropped back through the field.