Great player, most are awful (7)
I believe the answer is:
maestro
'great player' is the definition.
'maestro' can be an answer for 'player' (I have seen 'Top player' mean 'maestro' so perhaps 'player' could also mean 'maestro'). I am unsure of the 'great' bit.
'most are awful' is the wordplay.
'awful' indicates an anagram.
'most'+'are'='mostare'
'mostare' anagrammed gives 'MAESTRO'.
Can you help me to learn more?
(Other definitions for maestro that I've seen before include "Great figure" , "Wizard" , "Artist of consummate skill: conductor" , "Good conductor" , "great musician" .)