Imitate a dove? Goodness me (3)
I believe the answer is:
coo
I believe this is a double definition.
'imitate a dove?' is the first definition.
(a dove's noise is a coo)
'goodness me' is the second definition.
(exclamation of surprise)
(Other definitions for coo that I've seen before include "I'm surprised" , "Sound like a dove" , "Sound made by dove" , "Avian sound" , "crumbs" .)