Stimulation, awakening (7)
I believe the answer is:
arousal
This clue is a double definition.
'stimulation' is the first definition.
(synonyms)
'awakening' is the second definition.
(I've seen this before)
(Other definitions for arousal that I've seen before include "heating?" , "Awakening (of emotion, etc)" , "Act of awakening" , "Act of waking (someone)" , "Awakening; stimulation" .)