"Eat crow" or "talk turkey" (5)
I believe the answer is:
idiom
'eat crow or talk turkey' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for idiom that I've seen before include "characteristic use of language" , "Characteristic language of people or group" , "Dialect, vernacular" , "Characteristic style of expression" , "Special turn of phrase" .)