Wolfish line-up, perhaps (6)
I believe the answer is:
lupine
'wolfish' is the definition.
(thesaurus)
'line-up perhaps' is the wordplay.
'line-up' becomes 'lineup' ('lineup' can be a synonym of 'line-up').
'perhaps' is an anagram indicator.
'lineup' with letters rearranged gives 'LUPINE'.
(Other definitions for lupine that I've seen before include "Of or like wolves" , "like a wild animal" , "Wolfish" , "Like some ferocious beast" , "Like a wolf" .)