Related Clues:

• Well-thought-out
• Not missing any marbles
• Safe's partner
• Mentally well
• Cogent
• Having a full deck?
• Well-considered
• Right in the head
• Well-grounded
• Fit to stand trial
• Having good balance
• Fit to be tried?
• Not balmy
• 'Compos mentis'
• Healthy-minded