Abstinent pro catches streamer's debut on Twitch (7)

I believe the answer is:

ascetic

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'abstinent' is the definition.
(thesaurus)

'pro catches streamer's debut on twitch' is the wordplay.
'pro' becomes 'ace' (I've seen this in another clue).
'catches' is an insertion indicator.
'debut' indicates taking the first letters.
'on twitch' becomes 'tic' (tic is a kind of twitch. I am not sure about the 'on' bit.).
The initial letter of 'streamers' is 's'.
'ace' placed around 's' is 'asce'.
'asce'+'tic'='ASCETIC'

Can you help me to learn more?

(Other definitions for ascetic that I've seen before include "he never imbibes" , "Hermit" , "One living strict life" , "Practising severe self-discipline" , "Leading a severely simple life without worldly pleasures" .)

I've seen this clue in The Daily Express.

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