Go green, after cooking with yoghurt initially (6)
I believe the answer is:
energy
'go' is the definition.
(I've seen this before)
'green after cooking with yoghurt initially' is the wordplay.
'after cooking with' is an anagram indicator.
'initially' indicates taking the first letters.
The initial letter of 'yoghurt' is 'y'.
'green' mixed up with 'y' gives 'ENERGY'.
(Other definitions for energy that I've seen before include "Zest" , "Vigour, power" , "Seventeen forty six defeat for Bonnie Prince Charlie" , "Vitality, power" , "Exertion of force" .)