Something that comes with filling is near ground (6)
I believe the answer is:
sarnie
'something that comes with filling' is the definition.
(a sarnie or sandwich has a filling)
'is near ground' is the wordplay.
'ground' indicates an anagram ('grind' the letters into a new form).
'is'+'near'='isnear'
'isnear' is an anagram of 'SARNIE'.
(Other definitions for sarnie that I've seen before include "Familiar form of snack" , "no classy fare" , "Bread and filling snack (informal)" , "Two slices of bread with a filling" , "Sandwich (slang)" .)