Skim off grease from

• Make lean, in a way
• Trim, as a T-bone
• Remove richness, as from milk
• Do a skimmer's job
• Trim, as a roast
• Skim off grease
• Make healthier, in a way
• Prepare chicken, in a way

Wiktionary Word definitions in Wiktionary
vb. To remove fat from a material, especially by the use of solvents