Nieces raging about carbon technology (7)
I believe the answer is:
science
'technology' is the definition.
(thesaurus)
'nieces raging about carbon' is the wordplay.
'raging' indicates anagramming the letters.
'about' is an insertion indicator.
'carbon' becomes 'c' (C is the chemical symbol for carbon).
'nieces' anagrammed gives 'sience'.
'sience' enclosing 'c' is 'SCIENCE'.
(Other definitions for science that I've seen before include "Organised (search for) knowledge" , "Biology, perhaps?" , "Specialised knowledge" , "Subject such as biology, physics, etc" , "Eg, physics, biology" .)