This uses an anagram combined with a container clue. An anagram rearranges letters based on an indicator word, while a container puts one word inside another.
"Confused" is the anagram indicator - rearrange the letters of "Yes". Then "call" (meaning RING) goes inside this anagram to create the final answer.
Answer: SYRINGE | "Confused" indicates an anagram of "Yes" = SYE. "Call" = RING, which goes inside to give S-RING-YE, rearranged as SYRINGE (a dope dispenser).