Little person going around with nervous tic (6)

I believe the answer is:

twitch

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'nervous tic' is the definition.
'twitch' can be an answer for 'tic' (I've seen this before). I'm unsure of the 'nervous' bit.

'little person going around with' is the wordplay.
'little person' becomes 'titch' (informal term for a short person).
'going around' is an insertion indicator.
'with' becomes 'w' (abbreviation).
'titch' placed around 'w' is 'TWITCH'.

Can you help me to learn more?

(Other definitions for twitch that I've seen before include "Pang, tic" , "Move uncontrollably - watch birds" , "A spasm of tic" , "Move spasmodically" , "Jerk suddenly" .)

I've seen this clue in The Times.

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