Seasoned beef done with Smash is half-finished (8)
I believe the answer is:
pastrami
'seasoned beef' is the definition.
(I've seen this before)
'done with smash is half-finished' is the wordplay.
I cannot really understand how this works, but
'done' could be 'past' (both can mean finished) and 'past' is found within the answer.
The remaining letters 'rami' 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?
(Other definitions for pastrami that I've seen before include "Seasoned smoked beef, served in thin slices" , "Thinly sliced beef" , "Seasoned dish" , "A tramp is (anag) - meat" , "Spicy smoked beef" .)