Good man, expert about new preparation for shot (6)
I believe the answer is:
stance
'preparation for shot' is the definition.
I can't tell whether this definition defines the answer.
'good man expert about new' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'expert' becomes 'ace' (ace can informally mean very good).
'about' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'ace' going around 'n' is 'ance'.
'st'+'ance'='STANCE'
Can you help me to learn more?
(Other definitions for stance that I've seen before include "Batsman's position" , "Position, at the tee perhaps" , "Posture assumed" , "Player's posture for making, say, golf stroke" , "One's physical or mental attitude" .)