Unexpectedly asleep, if you don't mind (6)
I believe the answer is:
please
'if you don't mind' is the definition.
(I've seen this before)
'unexpectedly asleep' is the wordplay.
'unexpectedly' indicates an anagram.
'asleep' with letters rearranged gives 'PLEASE'.
(Other definitions for please that I've seen before include "suit" , "Entertain" , "Polite addition to a request" , "if you don't mind" , "Asleep (anag)" .)