What the Bible says about Meat offered to Idols
(From Forerunner Commentary)
Notice that no mention is made of clean or unclean. Paul is speaking of clean meats offered to idols, for some of the pagan deities were offered bullocks, sheep, goats, chickens, doves, and other clean animals, the remainder of which would be offered for sale in the market. His main subject is not clean and unclean, but being sensitive to a brother's conscience.
Richard T. Ritenbaugh
Clean and Unclean Meats