Rude devil right to embrace guy (8)
I believe the answer is:
improper
'rude' is the definition.
(thesaurus)
'devil right to embrace guy' is the wordplay.
'devil' becomes 'imp' (devilish creature).
'right' becomes 'R' (common abbreviation).
'to embrace' means one lot of letters goes inside another.
'guy' becomes 'rope ' (guy is a type of rope or cable).
'imp'+'r'='impr'
'impr' placed around 'rope' is 'IMPROPER'.
(Other definitions for improper that I've seen before include "Indecent or unsuitable" , "Not in accord with norms of behaviour" , "unacceptable?" , "Inappropriate" , "Naughty" .)