Terribly easy time, so far (2,3)
I believe the answer is:
as yet
'so far' is the definition.
(I've seen this before)
'terribly easy time' is the wordplay.
'terribly' is an anagram indicator.
'time' becomes 't' (abbreviation).
'easy' with letters rearranged gives 'asye'.
'asye'+'t'='AS YET'
(Other definitions for as yet that I've seen before include "Up to this point in time" , "Up till now" , "Thus far" .)