Egg on starter of chicken, he starts to eat ramen (5)
I believe the answer is:
cheer
'egg on' is the definition.
(thesaurus)
'starter of chicken he starts to eat ramen' is the wordplay.
'starter of' suggests taking the first letters.
'starts to' says to take the initial letters.
The first letter of 'chicken' is 'c'.
The first letters of 'eat ramen' is 'er'.
'c'+'he'+'er'='CHEER'
(Other definitions for cheer that I've seen before include "Buck up" , "one in three, perhaps" , "Shout of praise or joy" , "Perk up" , "Merriment" .)