A speaking part in "Tora! Tora! Tora!” (6)
I believe the answer is:
orator
'a speaking part' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'in tora tora tora' is the wordplay.
'in' says the answer is hidden in the clue.
'ORATOR' is hidden in the letters of 'tora tora tora'.
Can you help me to learn more?
(Other definitions for orator that I've seen before include "Eloquent public speaker" , "Skilled public speaker" , "One addressing" , "Formal speech maker" , "he can talk" .)