Singular hatred for element (6)
I believe the answer is:
sodium
'for element' is the definition.
(sodium is a kind of element)
'singular hatred' is the wordplay.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'hatred' becomes 'odium' (odium is a kind of hatred).
's'+'odium'='SODIUM'
(Other definitions for sodium that I've seen before include "Soft metallic element" , "Silver white metallic chemical element" , "Atomic number 11" , "Metal found in salt water, Na" , "Common salt is ...... chloride" .)