Wrong group supporting Queen (6)
I believe the answer is:
erring
'wrong' is the definition.
(thesaurus)
'group supporting queen' is the wordplay.
'group' becomes 'ring'.
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'ring' after 'er' is 'ERRING'.
(Other definitions for erring that I've seen before include "Making 7 down" , "Being incorrect" , "Sinful" , "Going wrong" , "Making a mistake" .)