Lend a hand to musician scoring introduction to ballad (6)
I believe the answer is:
assist
'lend a hand' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for assist that I've seen before include "Be helpful to" , "Give a hand to" , "Expedite" , "Aid, abet" , "Help member" .)