Record producer John still entertains largely just using covers (6)
I believe the answer is:
evelyn
'record producer john' is the definition.
The definition suggests a singular noun which matches the answer.
'still entertains largely just using covers' is the wordplay.
'still' becomes 'even' (synonyms).
'entertains' means one lot of letters goes inside another.
'largely just using covers' becomes 'ly' (I can't explain this - if you can you should believe this answer much more).
'even' going around 'ly' is 'EVELYN'.
Can you help me to learn more?
(Other definitions for evelyn that I've seen before include "& 25 Across Author of 'Decline and Fall'" , "man?" , "'Brideshead Revisited' was written by . . . . . . Waugh '" , "- Waugh, English author (Scoop)" , "Auberon Waugh's father" .)