بسم الله الرحمن الرحيم
If the said widow owns wealth equal to nisab after excluding the necessary expenses and the debt then she shall not be eligible for zakah and zakah cannot be given to her.
What is the total wealth the widow owns? If it is known then her eligibility and ineligibility may be confirmed.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.