Pretend lying unconsciously is wrong (10)
I believe the answer is:
kidnapping
'is wrong' is the definition.
(type of crime or wrong)
'pretend lying unconsciously' is the wordplay.
'pretend' becomes 'kid' (I've seen this before).
'lying unconsciously' becomes 'napping'.
'kid'+'napping'='KIDNAPPING'
(Other definitions for kidnapping that I've seen before include "Abducting" , "displaying criminality" , "offence" , "Abduction" .)