Millions in better political grouping (4)
I believe the answer is:
camp
'political grouping' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'millions in better' is the wordplay.
'millions' becomes 'm' (abbreviation).
'in' means one lot of letters goes inside another.
'better' becomes 'cap' (both can mean to beat somebody else's attempt).
'm' placed into 'cap' is 'CAMP'.
Can you help me to learn more?
(Other definitions for camp that I've seen before include "Set up tent - affected" , "doctrinaire group" , "Military settlement" , "Wildly theatrical" , "Exaggerated in style for humorous effect - in tent?" .)