Spanish gent turns pale - he's finished. (4,4)
I believe the answer is:
done with
'finished' is the definition.
(similar in meaning)
'spanish gent turns pale he's' is the wordplay.
I cannot really understand how this works, but
'gent' could be 'wit' and 'wit' is found within the answer.
'he' could be 'don' and 'don' is located in the answer.
The remaining letters 'eh' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for done with that I've seen is " Have no more use for, person or thing".)