Young people make sound pit workers (6)
I believe the answer is:
minors
'young people' is the definition.
(I've seen this before)
'make sound pit workers' is the wordplay.
'make sound' becomes 'mino' (I am not sure about this - if you are sure you should believe this answer much more).
'pit' means to remove the middle letters (I've seen 'pitted' mean this (to pit something is to remove its insides)).
'workers' becomes 'rats' (rat is a kind of worker).
'rats' with its centre removed is 'rs'.
'mino'+'rs'='MINORS'
Can you help me to learn more?
(Other definitions for minors that I've seen before include "They are legally under-age" , "could be little ones" , "Young people" , "They're under-age" , "They're too young to vote" .)