So far Yeats is read in translation (2,3)
I believe the answer is:
as yet
'so far' is the definition.
(I've seen this before)
'yeats is read in translation' is the wordplay.
'yeats' anagrams to 'AS YET'.
Though, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for as yet that I've seen before include "Up to this point in time" , "Up till now" , "Thus far" .)