Worries about left working with grand church music (9)
I believe the answer is:
plainsong
'church music' is the definition.
(I know that plainsong is a type of chant)
'worries about left working with grand' is the wordplay.
'worries' becomes 'pains' (pain can mean a worry or source of suffering).
'about' indicates putting letters inside.
'left' becomes 'L' (common abbreviation).
'working' becomes 'on' (on can mean working or activated).
'with grand' becomes 'g' (G is short for ground as in a thousand. I am not sure about the 'with' bit.).
'pains' enclosing 'l' is 'plains'.
'plains'+'on'+'g'='PLAINSONG'
Can you help me to learn more?
(Other definitions for plainsong that I've seen before include "church melody" , "Liturgical chant" , "Mediaeval church music" , "Lied, perhaps" , "accompanied vocal music? No" .)