A sort of terminal cut (11)
I believe the answer is:
curtailment
'a sort' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'of terminal cut' is the wordplay.
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'terminal'+'cut'='terminalcut'
'terminalcut' anagrammed gives 'CURTAILMENT'.
Can you help me to learn more?
(Other definitions for curtailment that I've seen before include "Bringing to an end" , "Contraction" , "Terminal cut (anag) - downsizing" , "premature end" , "Abridgement, shortening" .)