After losing cases Iron Maiden drops one crew member (6)
I believe the answer is:
roadie
'member' is the definition.
(I have seen 'Member of crew' mean 'roadie' so perhaps 'member' could also mean 'roadie')
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for roadie that I've seen before include "Musical tour crew member" , "Touring band's helper" , "Touring band's worker" , "Member of support crew" , "help with the group" .)