Club supports discharge of one throwing weight about (4-6)
I believe the answer is:
shot-putter
'one throwing weight about' is the definition.
The definition suggests a singular noun which matches the answer.
'club supports discharge of' is the wordplay.
'club' becomes 'putter' (a golf club).
'supports' is a charade indicator (letters next to each other) (bottom letters provide a support for the top ones).
'discharge of' becomes 'shot' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'putter' after 'shot' is 'SHOT-PUTTER'.
Can you help me to learn more?
(Other definitions for shot-putter that I've seen before include "Field athlete" , "sportsperson using strong-arm tactics" , "Athlete hurling heavy metal ball" , "Athlete throwing heavy ball" .)