Crossword Genius

Do without it, as ban involved (7)

Ross

I believe the answer is:

abstain

'do without' is the definition.
(I've seen this before)

'it as ban involved' is the wordplay.
'involved' is an anagram indicator (involved can mean confusing or complex).
'it'+'as'+'ban'='itasban'
'itasban' is an anagram of 'ABSTAIN'.

(Other definitions for abstain that I've seen before include "not come down on either side" , "Choose not to consume" , "Formally decline to vote" , "Choose not to vote, or drink" , "Give backing to" .)

I've seen this clue in The Times and The Telegraph.
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