Possible Clues:

• Object: to make a tiresome person admit corruption
• Express dissent
• Speak against or for, at the trial
• Object of professional examination
• Expostulate, or go off, when the pets romp about outside
• Object to backing the experiment
• An expression of disagreement with the match from which amateurs are excluded
• Argue in favour of trial
• Demurral
• The way to object to a match that's not for amateurs