Given too much seafood? Finally, the diet is abandoned! (9)
I believe the answer is:
surfeited
'given too much' is the definition.
The answer and definition can be both related to consumption as well as being past participle verbs.
Maybe you can see a link between them that I don't see?
'seafood? finally the diet is abandoned' is the wordplay.
'seafood?' becomes 'surf' (I am not sure about this - if you are sure you should believe this answer much more).
'finally' suggests the final letters.
'is abandoned' indicates an anagram (the original order is abandoned).
The last letter of 'the' is 'e'.
'diet' anagrammed gives 'ited'.
'surf'+'e'+'ited'='SURFEITED'
Can you help me to learn more?
(Other definitions for surfeited that I've seen before include "stuffed" , "Ate too much" .)