Cured or smoked ham (6)
I believe the answer is:
gammon
'cured or smoked ham' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gammon that I've seen before include "Hoax - hock of hog" , "Hind portion of a side of bacon" , "Cured or smoked ham" , "Cured ham; nonsense" , "Bottom piece of a side of bacon" .)