Race Comment Explainer

Original comment with matches highlighted:

towards rear, nd plenty 5th, pushed along and 3 out, made no impression

Matched phrases & meanings

Phrase	Meaning
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Towards rear	Running near the back of the field.
plenty to do	The horse is positioned far behind the leaders, has a lot of ground to make up, or is blocked by traffic.
not fluent	The horse jumped the tenth fence/hurdle poorly or awkwardly

Summary

The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Running near the back of the field.
The horse is positioned far behind the leaders, has a lot of ground to make up, or is blocked by traffic.
The horse jumped the tenth fence/hurdle poorly or awkwardly