"Open sesame” speaker (3,4)
I believe the answer is:
ali baba
'open sesame speaker' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ali baba that I've seen before include "One with forty theives" , "Arabian Nights character" , "PANTO (part title)" , "One linked with forty thieves" , "With 40 thieves, he's a fictional woodcutter" .)