Detail turned out to be shadowed (6)
I believe the answer is:
tailed
'be shadowed' is the definition.
(I've seen this in another clue)
'detail turned out' is the wordplay.
'turned out' indicates anagramming the letters (turn out can mean to organise).
'detail' anagrammed gives 'TAILED'.
'to' acts as a link.
(Other definitions for tailed that I've seen before include "Secretly followed" , "Followed like rear appendage" , "Followed informally in detail" , "as a dog at the end" , "In slang, followed like private detective" .)