hubieran instigado
-they/you had incited
Antecopréterito de subjuntivo para el sujeto ellos/ellas/ustedes del verbo instigar.

instigar

Menos mal que dieron marcha atrás y los trabajadores pudieron mantener sus empleos, ya que no tenían pruebas de que hubieran instigado la huelga.
However, the good news was that they reversed the decision and the workers retained their jobs since there was no evidence that they had instigated the strike.
Palabra del día
el ponche de huevo