Singular data (5)
I believe the answer is:
datum
This clue could be a double definition.
'singular' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'data' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for datum that I've seen before include "Given piece of information" , "Given point or position" , "One item of information" , "Single informative fact" , "bit of info" .)