Let it stand the test anew (4)
I believe the answer is:
stet
'let it stand' is the definition.
(I've seen this in another clue)
'test anew' is the wordplay.
'anew' indicates an anagram.
'test' is an anagram of 'STET'.
'the' is the link.
(Other definitions for stet that I've seen before include "Ignore crossing" , "'Let it stand, in printing (4)'" , "Printer's annotation - let it stand" , "Instruction to ignore amendment" , "Leave in, as text" .)