Unkempt devil she led astray (11)
I believe the answer is:
dishevelled
'unkempt' is the definition.
(I've seen this before)
'devil she led astray' is the wordplay.
'astray' indicates anagramming the letters.
'devil'+'she'+'led'='devilsheled'
'devilsheled' with letters rearranged gives 'DISHEVELLED'.
(Other definitions for dishevelled that I've seen before include "(Of hair or clothing) untidy" , "ill-groomed" , "Not well turned out" , "In mess" , "Slovenly" .)