Asleep when roused in delight (6)
I believe the answer is:
Here is my best explanation:
'delight' is the definition.
('please' can be a synonym of 'delight')
'asleep when roused' is the wordplay.
'asleep' can be anagrammed to 'PLEASE'.
Though, I'm not clear how the anagram is indicated.
'in' is the link.
(Other definitions for please that I've seen before include "(Word used in) asking or accepting politely", "Want", "Asleep (anag)", "delight", "Make cheerful", "Satisfy while asleep", "It's said to help", "Give pleasure to (someone)", "if you don't mind" and "cheer up".)