Getting a piano and a group of singers is high-priority (8)
I believe the answer is:
pressing
'getting a piano and a group' is the definition.
I can't judge whether this definition defines the answer.
'of singers is high-priority' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'is high' indicates taking the first letters (I've seen 'highest of' mean this (top letter - down clues only)).
The initial letter of 'priority' is 'p'.
'singers'+'p'='singersp'
'singersp' with letters rearranged gives 'PRESSING'.
Can you help me to learn more?
(Other definitions for pressing that I've seen before include "Task for record company" , "Urgent or crowding" , "Requiring immediate attention" , "Requiring quick action" , "in need of immediate attention" .)