Morsel swallowed by Naomi - model with a sense of purpose (8)
I believe the answer is:
ambition
'purpose' is the definition.
(thesaurus)
'morsel swallowed by naomi model' is the wordplay.
'morsel' becomes 'bit' ('bit' can be a synonym of 'morsel').
'swallowed by' is an insertion indicator.
'model' indicates anagramming the letters.
'naomi' with letters rearranged gives 'amion'.
'bit' placed within 'amion' is 'AMBITION'.
'with a sense of' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for ambition that I've seen before include "Target" , "Aspiration - goal" , "Strong desire to achieve, fame or fortune" , "Strong desire for success" , "Desire to achieve success" .)