It's a ban put out - so keep away (7)
I believe the answer is:
abstain
'keep away' is the definition.
(I've seen this before)
'it's a ban put out' is the wordplay.
'put out' is an anagram indicator.
'its'+'a'+'ban'='itsaban'
'itsaban' is an anagram of 'ABSTAIN'.
'so' acts as a link.
(Other definitions for abstain that I've seen before include "Spare" , "Give backing to" , "Desist" , "Forego,do without" , "Avoid" .)