بِمَعْنَى خَلْقِ الضَّلَالَةِ وَالِاهْتِدَاءِ
That is, the creation of misguidance and of actual guidance.
Ihtidāʾ is the servant's actual becoming rightly guided, accepting and following the truth. Dalālah is the act of showing someone the way. They are not equivalent: a person may receive accurate directions without following them, whereas actually coming to follow the truth is a further state.
Explaining divine guidance as the creation of ihtidāʾ safeguards the uniqueness of Allah's creative act. A preacher's words may be an occasion or means, but the effective occurrence of inner guidance is created by Allah.