Cream guitarist's accessory (4)
I believe the answer is:
pick
This clue might be a double definition.
'cream' is the first definition.
(both can mean the best of a group)
'guitarist's accessory' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for pick that I've seen before include "hacker?" , "Select - ground breaker" , "Choose - tool for breaking up ground" , "Choose, select" , "Select - implement" .)