Crossword Genius

Fundamental principles (7)

Ross

I believe the answer is:

bedrock

'fundamental principles' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for bedrock that I've seen before include "Fundamental principle" , "Solid foundation" , "Fundamental principles" , "Basis" .)

I've seen this clue in The Telegraph and The Independent.
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