Notices feature the twitch (3)
I believe the answer is:
tic
'the twitch' is the definition.
(tic is a kind of twitch)
'notices feature' is the wordplay.
'feature' indicates a hidden word (I've seen 'featuring' mean this).
'TIC' is hidden within 'notices'.
(Other definitions for tic that I've seen before include "Involuntary muscular spasm" , "Nervous spasm" , "Localised habitual twitch, especially to the face" , "Regular muscular twitch" , "Involuntary contraction" .)