Custom officers at Hong Kong airport recovered more than half of a kilogram of cocaine from an African visitor who had allegedly hidden the drug in her body.The 37-year-old Nigerian arrived in the city on a flight from Lagos via Addis Ababa, Ethiopia.Customs officers intercepted the suspect, who claimed to be a businesswoman and was acting suspiciously, shortly after her arrival on Thursday.She was taken to Queen Elizabeth Hospital in Yau Ma Tei for a check-up and confirmed to have foreign…