This uses a charade (combining separate elements) - look for parts that can be joined together, with one part being an anagram indicated by a mixing word.
"Negotiable" indicates an anagram of "cost" - but this anagram goes around the letter R (recipe). You also need ES at the start (more than one E, representing the drug ecstasy).
Answer: ESCORTS | ES (plural of E for ecstasy = "Drugs") + anagram of "cost" around R ("recipe") = ES + CORT around R = ES + C-R-OT = ESCORTS