Overcaffeinated (5)
I believe the answer is:
wired
'overcaffeinated' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wired that I've seen before include "Connected to an electricity supply" , "Using cables; tense, edgy" , "set up for broadcast?" , "In a tense state" , "Nervous" .)