A lot of hard work by nearly everybody regarding singing (6)
I believe the answer is:
choral
'singing' is the definition.
(thesaurus)
'a lot of hard work by nearly everybody regarding' is the wordplay.
I cannot quite understand how this works, but
'a' is within the answer.
'lot' could be 'c' and 'c' is found within the answer.
'of' could be 'o' and 'o' is present in the answer.
'hard' could be 'h' (abbreviation used in pencil classifications) and 'h' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for choral that I've seen before include "Of a singing group" , "Sung by a band of singers" , "Sung by many voices" , "Beethoven symphony" , "Music for groups of singers" .)