What, for the greater part, we need to do (3)
I believe the answer is:
eat
'do' is the definition.
Although both the answer and definition are verbs in their base form, I cannot understand how one could define the other.
'what for the greater part we need' is the wordplay.
'EAT' is hidden in amongst the letters.
But, I'm not sure how the hidden word is indicated.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for eat that I've seen before include "Be corrosive" , "tolerate in diet" , "Dine in a restaurant" , "Worry" , "Partake of" .)