Meat from sheep I finished first (8)
I believe the answer is:
pastrami
'meat' is the definition.
(pastrami is a kind of meat)
'sheep i finished first' is the wordplay.
'sheep' becomes 'ram' (male sheep).
'finished' becomes 'past' (I've seen this in another clue).
'first' means one lot of letters go next to another.
'ram'+'i'='rami'
'rami' after 'past' is 'PASTRAMI'.
'from' acts as a link.
(Other definitions for pastrami that I've seen before include "Meat dish" , "A tramp is (anag) - meat" , "Spiced smoked beef" , "Seasoned dish" , "Spiced sliced beef" .)