Finish hearty liver and salad delicacy (6)
I believe the answer is:
endive
'salad delicacy' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'finish hearty liver' is the wordplay.
'finish' becomes 'end' (synonyms).
'hearty liver' becomes 'ive' (I can't justify this - if you can you should believe this answer much more).
'end'+'ive'='ENDIVE'
'and' is the link.
Can you help me to learn more?
(Other definitions for endive that I've seen before include "Envied the salad green badly" , "Envied (anag.)" , "Salad plant with crisp curly leaves" , "Plant used in salads" , "salad ingredient" .)