Holding the top three places for opium production around delta (6)
I believe the answer is:
podium
'holding the top three places for opium production around delta' is the definition.
I can't judge whether this defines the answer.
'opium production around delta' is the wordplay.
'production' indicates an anagram.
'around' means one lot of letters goes inside another.
'delta' becomes 'd' (phonetic alphabet: alpha, bravo, charlie etc.).
'opium' with letters rearranged gives 'poium'.
'poium' enclosing 'd' is 'PODIUM'.
Can you help me to learn more?
(Other definitions for podium that I've seen before include "Platform or pedestal" , "Platform for speaking from" , "Stage" , "Position of speaker" , "Lecturer's platform" .)