He's very good at throwing and catching (7)
I believe the answer is:
juggler
'he's very good at throwing and catching' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for juggler that I've seen before include "Balls-in-air entertainer" , "One keeping several things in the air" , "Conjuror" , "Circus performer" , "One performs tricks of manual dexterity" .)