Crossword Genius

Instruction (7)

Ross

'instruction' is the definition.
(thesaurus)

This is the entire clue.

(Other definitions for precept that I've seen before include "Tax" , "General rule for behaviour" , "Rule of conduct or command" , "Rule of action" , "Moral rule" .)

I've seen this clue in the Evening Standard, The Mirror and The Independent.
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