Possible Clues:

• Planet explored by Voyager I
• No need to give one another ring - got plenty already
• As perhaps it's ringed
• 'As, perhaps, Jupiter comes before its rings (6)'
• As, perhaps, one has rings
• God of agriculture
• Galileo discovered its rings
• 'As, perhaps, this comes beyond Jupiter (6)'
• Solar system planet
• Agricultural power and 9, visited by 1 Down next and 28 2 on a 16