Security feature present in electric blankets (8)
I believe the answer is:
sentinel
'security' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'feature present in electric blankets' is the wordplay.
'feature' says the answer is hidden in the clue (I've seen 'feature of' mean this).
'SENTINEL' is hidden within 'present in electric blankets'.
Can you help me to learn more?
(Other definitions for sentinel that I've seen before include "One stands and keeps watch" , "Guardsman" , "One watching" , "Look out" , "Guard whose job is to stand and keep watch" .)