Related Clues:

• Particular
• Greenery
• Requirement
• On ___ (without commitment)
• Blueprint item
• On ___ (like much freelance work)
• Leaves
• Green stuff
• On ___ (without assurance of payment)
• Small detail?
• On ___ (without a contract)
• Particular, for short
• Something to build on?
• What a house may be built on
• It's sometimes built on