Capote's work incorporated lineage (2,4,5)
I believe the answer is:
in cold blood
'capote's work incorporated lineage' is the definition.
I can't tell whether this definition defines the answer.
'incorporated lineage' is the wordplay.
I cannot really understand how this works, but
'incorporated' could be 'inc' and 'inc' is found in the answer.
'lineage' could be 'blood' (synonyms) and 'blood' is present in the answer.
The remaining letters 'old' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for in cold blood that I've seen before include "with evil intent" , "Ruthlessly" , "Without feeling or mercy" , "Acting without mercy" , "snakes operate?" .)