Regrets some untrue statements (4)
I believe the answer is:
rues
'regrets' is the definition.
(I've seen this before)
'some untrue statements' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'RUES' is hidden within 'untrue statements'.
(Other definitions for rues that I've seen before include "Bemoans" , "Is sorry for - plants" , "Regrets, to be sure" .)