Speaker recalled marsupial eating rodent (6)
I believe the answer is:
orator
'speaker' is the definition.
(I know that orator is a type of speaker)
'recalled marsupial eating rodent' is the wordplay.
'recalled' shows that the letters should be reversed in order (to recall can mean to bring something back).
'marsupial' becomes 'roo' (short for kangaroo).
'eating' indicates putting letters inside.
'rodent' becomes 'rat' (rat is a kind of rodent).
'roo' backwards is 'oor'.
'oor' enclosing 'rat' is 'ORATOR'.
(Other definitions for orator that I've seen before include "A gifted public speaker" , "An impressive public speaker" , "I declaim" , "he can talk" , "To roar at a speech-maker" .)