Solutions Supple has 16 entries with similar clues

• 3-letter words
• gncChain with supplements
• ssiSupplemental Security Income
• addSupplement
• 5-letter words
• addedSupplementary
• extraSupplemental
• 6-letter words
• lissomSlim, supple, and graceful
• add-onFeature supplementing standard model
• 7-letter words
• augmentSupplement
• codicilSupplement to a will
• 8-letter words
• addenduma theologian with ambition starts to underline much in book's supplement
• 9-letter words
• accessorySupplementary item
• auxiliarySupplementary
• ancillarySupplementary
• 10-letter words
• cuttlefishShellfish whose internal shell is placed in birdcages to supplement the bird's diet
• subsidiarySupplementary
• additionalSupplementary