Twitch ring around about the ear (4)
I believe the answer is:
otic
'about the ear' is the definition.
(I've seen this in another clue)
'twitch ring' is the wordplay.
I cannot quite understand how this works, but
'twitch' could be 'tic' (tic is a kind of twitch) and 'tic' is present in the answer.
'ring' could be 'o' (letter resembling a ring) and 'o' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'around' acts as a link.
Can you help me to learn more?
(Other definitions for otic that I've seen before include "of concern to the listener" , "about hearing" , "organ" , "Listener's" , "of lugs" .)