Wicked queen on phone (6)
I believe the answer is:
erring
'wicked' is the definition.
'queen on phone' is the wordplay.
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'on' is a charade indicator (letters next to each other).
'phone' becomes 'ring' (synonyms).
'er'+'ring'='ERRING'
(Other definitions for erring that I've seen before include "Going wrong" , "Being incorrect" , "Making a mistake" , "Making 7 down" , "taking wrong direction" .)