Tennis player's skill pinches prize on the backhand (7)
I believe the answer is:
topspin
'tennis player's skill' is the definition.
'pinches prize on the backhand' is the wordplay.
'pinches' becomes 'tops' ('top' can be a synonym of 'pinch').
'prize on the backhand' becomes 'pin' (I am not sure about this - if you are sure you should believe this answer much more).
'tops'+'pin'='TOPSPIN'
Can you help me to learn more?
(Other definitions for topspin that I've seen before include "Revolutionary movement" , "Way of making a ball curve" , "Warne might use this" , "Rotation given to ball" , "Curving ball's rotation" .)