Outracing formation in battle (9)
I believe the answer is:
agincourt
'battle' is the definition.
(Agincourt is an example)
'outracing formation' is the wordplay.
'formation' is an anagram indicator.
'outracing' is an anagram of 'AGINCOURT'.
'in' is the link.
(Other definitions for agincourt that I've seen before include "Henry V's battle" , "1415 battle in the Pas-de-Calais" , "French village" , "October twenty four, 1415 battle" , "Fourteen fifteen English victory" .)