Related Clues:

• Extraordinary talent that's hidden
• "Cross your heart?"
• Hidden in hotel at entrance, as yet undiscovered
• Hidden (potential)
• Like some potential
• So-called gardener working by one capital
• Feasible achievable
• Achievable, feasible
• Undiscovered
• A canvas by Lowry originally undeveloped
• A bit icy, pal -- awkward for a gardener to show skill
• Not presently active
• Previous set of books undiscovered
• Like many fingerprints
• Hidden, as fingerprints