Queen fled with yours truly (4)
I believe the answer is:
rani
'queen' is the definition.
(thesaurus)
'fled with yours truly' is the wordplay.
'fled' becomes 'ran' (I've seen this before).
'with' says to put letters next to each other.
'yours truly' becomes 'i'.
'ran'+'i'='RANI'
(Other definitions for rani that I've seen before include "Indian princess" , "Indian queen" , "Wife of a rajah" , "Raja's wife" , "Royal Indian female" .)