Paltry contribution from a friend (3)
I believe the answer is:
pal
'friend' is the definition.
(pal can mean a friend)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for pal that I've seen before include "Buddy, chum" , "Bud" , "Mate, buddy" , "Close friend" , "Mate, informal friend" .)