Wrong to make a request of sheep, missing tail (5)
I believe the answer is:
askew
'wrong' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for askew that I've seen before include "in an odd position" , "Leaning to one side" , "At an angle, 19 Down" , "Off-centre" , "Twisted" .)