Possible Clues:

• Exhibition custodian
• One in charge of show dog cheers up, getting gold
• Schedule backed by dog keeper
• Wretched chap with list of duties taking turn as supervisor
• Administrator reduced men serving round Royal Academy
• Rude men flanking a museum administrator
• Keeper cut price in copper and gold
• Keeper's dog eats rodent and duck
• Blunt men taking in a museum keeper
• Dog schedule backed by keeper