Related Clues:

• Race bettor's adviser
• Informer, informally
• Police informant
• Racetrack tout
• Bettor's buddy
• Track figure
• Singing pigeon
• Betting advisor, perhaps
• Bettor's adviser
• Narc
• One with the inside track at the track?
• Singer of a sort
• Kind of a rat
• Type of singer?
• Police informer