Possible Clues:

• Anger that king has broken a bone
• Rider's foot holder
• Agitation in the saddle about rider’s first piece of tack
• Equestrian loop
• Purist upset, making case for right riding equipment
• Satisfied noise from cat — it's turned over footrest
• Equestrian foot rest
• It's to be raised, bishop winning support for a jockey
• Rouse to action gathering right support
• What the cat says, it's upset what might give you a leg up