Loathing of treated carbon here? (10)
I believe the answer is:
abhorrence
'loathing' is the definition.
(synonyms)
'treated carbon here?' is the wordplay.
'treated' is an anagram indicator.
'carbon'+'here'='carbonhere'
'carbonhere' anagrammed gives 'ABHORRENCE'.
'of' acts as a link.
(Other definitions for abhorrence that I've seen before include "Feeling of revulsion" , "hatred" , "Disgusted loathing" , "Hate" .)