Guiding principles about fondue, regularly ignored (4)
I believe the answer is:
code
'guiding principles' is the definition.
'code' can be an answer for 'principles' (a moral code). I'm unsure of the 'guiding' bit.
'about fondue regularly ignored' is the wordplay.
'about' becomes 'c' (abbreviation for 'circa').
'regularly ignored' indicates alternate letters (letters removed at regular intervals).
The alternate letters of 'fondue' are 'ode'.
'c'+'ode'='CODE'
Can you help me to learn more?
(Other definitions for code that I've seen before include "Collection of laws" , "Cryptogram or set of standards" , "Morse is a good example" , "See 21 Across" , "Computer language, say" .)