Given work from a lead singer, autographed (8)
I believe the answer is:
assigned
'given' is the definition.
'work from a lead singer autographed' is the wordplay.
'work from a lead singer' becomes 'as' (I can't explain this - if you can you should give a lot more credence to this answer).
'autographed' becomes 'signed' (similar in meaning).
'as'+'signed'='ASSIGNED'
Can you help me to learn more?
(Other definitions for assigned that I've seen before include "'Allotted, ascribed (8)'" , "Given a task" , "Allocated" , "Appointed to a duty or task" , "Alloted, ascribed" .)