Possible Clues:

• Annoying activity in court?
• Making an effort, or straining one's patience
• Irksome responsibility of the first Baron Jeffreys of Wem
• Hard to stand, despite the effort
• Difficult, attempting
• Intentionally exasperating?
• Vexatious - having a go
• Making an effort is stressful
• If you find this hard to endure try making yourself a drink
• Doing one's best to a pest