Without her surname and/or when she died, I can't see anyway to find her grave.
The only things I can think of are
a. Other family members (try and trace children/grandchildren of siblings). Facebook perhaps or the Cemetery masses poster earlier if you can attend.
b. A death notice in a newspaper that would hopefully mention the Smith name as well.
https://www.irishnewsarchive.com/c. Very local knowledge, for example sometimes a priest will note down on a baptism who a person married, when it happens it is usually when the person marries in a different parish and sent for a letter of freedom to their home church in order to marry so contacting the church where she was baptised might be use full.
Do you know if she lived in Tramore long before she died, Tramore has a local community radio station, it has a facebook page,
https://www.facebook.com/TCRfm/Retired postal workers can be a gold mind on local families, my mother recently astounded a local historian by knowing the story of every child who wrote an essay for the folk lore collection from the local school, which died young, who they married, who moved away and so on, she is several years younger than any of those children.
