Biblical queendom
I believe the answer is:
sheba
'biblical queendom' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sheba that I've seen before include "Solomon was visited by this country's queen" , "Old Testament realm of queen visiting Solomon" , "Biblical Queen of . . . . . visited King Solomon" , "Ancient people of Yemen, Sabaeans" , "Queen in the Bible unnamed except for her country; Balkis or Bilkis in the Quran" .)