Meatless, for short (3)
I believe the answer is:
veg
'meatless for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for veg that I've seen before include "Slob?" , "Eg, sprouts, parsnips" , "Potatoes and cabbages etc" , ""Meat and two __ "" , "Food plants" .)