Why is the article lām clear in «الْأَفْئِدَةِ»?

Al-Māʿūn and Al-Humazah: Applied Assimilation, Concealment, Madd and Hāʾ Rules

• Hamzah after lām is a moon letter
• Ṣād follows lām
• Nūn sākinah meets wāw
• There is doubled ghunnah