Some had donations to join to the list (3-2)
I believe the answer is:
add-on
'join to the list' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'some had donations to' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'ADD-ON' can be found hidden inside 'had donations to'.
Can you help me to learn more?
(Other definitions for add-on that I've seen before include "Accessory device" , "Feature supplementing standard model" , "Optional item as supplement or increment" , "Extra bit" , "Extra peripheral item" .)