Raised strips drop off (5)
I believe the answer is:
sleep
'drop off' is the definition.
(thesaurus)
'raised strips' is the wordplay.
'raised' says the letters should be written backwards.
'strips' becomes 'peels' (peeling is a kind of stripping).
'peels' back-to-front is 'SLEEP'.
(Other definitions for sleep that I've seen before include "Doze, nap" , "Slumber" , "crash" , "Snooze" , "''... that knits up the ravell'd sleeve of care'' (Macbeth)" .)