Using right arm, accompanist gathered up some material for the road (6)
I believe the answer is:
tarmac
'up some material for the road' is the definition.
I can't judge whether this definition defines the answer.
'using right arm accompanist gathered' is the wordplay.
'gathered' indicates the answer is hidden within the clue (I've seen 'gathering' mean this (parts of the clue hold or gather the answer)).
'TARMAC' is hidden within 'using right arm accompanist'.
Can you help me to learn more?
(Other definitions for tarmac that I've seen before include "Road paving material" , "short runway, perhaps" , "Trade name for road surfacing material" , "Road surface material of tar and stone" , "something for the road" .)