Pursued wrong detail (6)
I believe the answer is:
tailed
'pursued' is the definition.
(tailing is a kind of pursuing)
'wrong detail' is the wordplay.
'wrong' is an anagram indicator.
'detail' anagrammed gives 'TAILED'.
(Other definitions for tailed that I've seen before include "Followed informally in detail" , "as a dog at the end" , "Followed (suspect)" , "Followed, tracked" , "Followed like rear appendage" .)