Related Clues:

• A five in the trial is a series of trials
• There's trouble with the vat with the rail
• At last a strong show of strength
• What help can this be at last to your labours?
• 'Strive to make it keep, by the sound of it (6)'
• Must be made with strength to be strong at last
• 'Great strength for a castle, by the sound of it (6)'
• The labour needed to get a vat by rail
• It takes exertion because it's in a newt
• The work needed to replace T with F?
• To drag wearily round museum is hard work
• It's a struggle for an amphibian to get round
• Amphibian keeps supporting endeavour
• Hang around Virginia, seeking labour
• Labour finds a victorious leader in course