Disturbed night — drug please! (8,7)
I believe the answer is:
sleeping draught
'disturbed night drug please' is the definition.
I can't judge whether this definition defines the answer.
'disturbed night drug please' is the wordplay.
'disturbed' indicates an anagram.
'night'+'drug'+'please'='nightdrugplease'
'nightdrugplease' anagrammed gives 'SLEEPING-DRAUGHT'.
(Other definitions for sleeping draught that I've seen before include "This should make for a quiet night" , "Soporific" .)