Finally devour two chocolate eggs (3)
I believe the answer is:
roe
'eggs' is the definition.
(fish eggs)
'finally devour two chocolate' is the wordplay.
'finally' says to take the final letters.
The final letters of 'devour two chocolate' are 'ROE'.
(Other definitions for roe that I've seen before include "Mass of fish eggs" , "Hoofed animal(s)" , "shy animal" , "Lobster's ripe ovary" , "Swift runner" .)