Useless as person volunteering for charity work? (4-3-7)
I believe the answer is:
good-for-nothing
'useless' is the definition.
(thesaurus)
'person volunteering for charity work?' is the wordplay.
I cannot really understand how this works, but
'person' could be 'good' (good person is a kind of person) and 'good' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'as' acts as a link.
Can you help me to learn more?
(Other definitions for good-for-nothing that I've seen before include "Ultimate sale bargain" , "Worthless person" , "Waster" .)