Top person of superior quality recovered more fully (6)
I believe the answer is:
better
'top' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for better that I've seen before include "Comparatively good" , "More desirable; gambler" , "One making wager; more advantageous" , "More appropriate; gambler" , "'Discretion is the . . . . . . part of valour'" .)