Undercooked morsel that's eaten (7)
I believe the answer is:
rarebit
'that's eaten' is the definition.
I can't tell whether this definition defines the answer.
'undercooked morsel' is the wordplay.
'undercooked' becomes 'rare' (I've seen this in another clue).
'morsel' becomes 'bit' (synonyms).
'rare'+'bit'='RAREBIT'
Can you help me to learn more?
(Other definitions for rarebit that I've seen before include "cheesy meal" , "Arbiter of tasty Welsh dish of cheese on toast" , "Savoury dish of cheese on toast" , "on Welsh table?" , "Simple dish" .)