At home abstaining, having drunk cider inside bar (9)
I believe the answer is:
interdict
'bar' is the definition.
(thesaurus)
'at home abstaining having drunk cider' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'abstaining' becomes 'tt' (I can't justify this - if you can you should give a lot more credence to this answer).
'having' is an insertion indicator.
'drunk' is an anagram indicator.
'cider' anagrammed gives 'erdic'.
'tt' enclosing 'erdic' is 'terdict'.
'in'+'terdict'='INTERDICT'
'inside' acts as a link.
Can you help me to learn more?
(Other definitions for interdict that I've seen before include "Prohibit, forbid" , "Ban" , "An authoritative prohibition, maybe by church" , "Credit tin (anag) - ecclesiastical sanction" , "Prohibit - tin credit (anag)" .)