Ban Asti perhaps? (7)

I believe the answer is:

abstain

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'ban asti perhaps?' is the definition.
I can't judge whether this definition defines the answer.

'ban asti perhaps?' is the wordplay.
'perhaps?' indicates an anagram (I've seen 'perhaps' mean this).
'ban'+'asti'='banasti'
'banasti' with letters rearranged gives 'ABSTAIN'.

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(Other definitions for abstain that I've seen before include "Don't drink" , "Formally decline to vote" , "Avoid" , "Don't vote" , "Refrain, forbear" .)

I've seen this clue in The Sun.

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