At many a racing venue, one may be lucky (6)
I believe the answer is:
mascot
'one may be lucky' is the definition.
I know that 'lucky' relates to this answer.
'at many a racing venue' is the wordplay.
'at' is a charade indicator (letters next to each other).
'many' becomes 'm' (Roman numeral for a thousand).
'a racing venue' becomes 'ascot' (English race course).
'm' next to 'ascot' is 'MASCOT'.
Can you help me to learn more?
(Other definitions for mascot that I've seen before include "Bringer of good luck to team, etc" , "Lucky talisman" , "Thing believed to bring good luck to, say, team" , "Team's good-luck bringer" , "Team's good luck bringer" .)