This will include some nutriment and some nutriment will include it! (4)
I believe the answer is:
menu
'this will include some nutriment' is the definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'some nutriment will include it' is the wordplay.
'MENU' is hidden in amongst the letters.
But, I'm unsure how this is indicated.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for menu that I've seen before include "Restaurant fare" , "Range of dishes available" , "that can appear on computer screen" , "Food programme of restaurant" , "List of food items on offer" .)