Fundamental parts in clue edited (6)

I believe the answer is:
nuclei
'fundamental parts' is the definition.
'nuclei' can be an answer for 'parts' (nucleus is a kind of part). I am unsure of the 'fundamental' bit.
'in clue edited' is the wordplay.
'edited' is an anagram indicator.
'in'+'clue'='inclue'
'inclue' anagrammed gives 'NUCLEI'.
Can you help me to learn more?
(Other definitions for nuclei that I've seen before include "Atom cores" , "hearts" , "Bases" , "masses, at the core" , "Central parts of atoms" .)
