Up till now, ground has turf (4,3)
I believe the answer is:
thus far
'up till' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'ground has turf' is the wordplay.
'ground' indicates an anagram ('grind' the letters into a new form).
'has'+'turf'='hasturf'
'hasturf' anagrammed gives 'THUS FAR'.
'now' acts as a link.
Can you help me to learn more?
(Other definitions for thus far that I've seen before include "'Up to now (4,3)'" , "Up to this point" .)