Below are possible answers for the crossword clue Underlying support for an idea.
5 letter answer(s) to underlying support for an idea
BASIS
a relation that provides the foundation for something; "they were on a friendly footing"; "he worked on an interim basis"
the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture"
Other crossword clues with similar answers to 'Underlying support for an idea'