For me, Ena is covered by this (8)
I believe the answer is:
forename
'this' is the definition.
The definition suggests a singular noun which matches the answer.
'for me ena is covered' is the wordplay.
'is covered' indicates putting letters inside (inserted letters get covered up).
'for'+'me'='forme'
'forme' going around 'ena' is 'FORENAME'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for forename that I've seen before include "perhaps Napoleon, though not Hitler?" , "The 'John' of 'John Smith'" , "First part of a person's identity" , "First moniker" .)