A letter to Ruth from Vera (5)
I believe the answer is:
truth
'vera' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'a letter to ruth' is the wordplay.
'a letter' becomes 't'.
't'+'ruth'='TRUTH'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for truth that I've seen before include "Veracity, faithfulness" , "Verity" , "Gospel" , "Beauty is (said Keats)" , "Candour" .)