Veto complicated board games da's pulled out (7)
I believe the answer is:
embargo
'veto' is the definition.
(thesaurus)
'complicated board games da's pulled out' is the wordplay.
'complicated' indicates anagramming the letters (a complex or confusing ordering of the letters).
'pulled out' indicates named letters should be taken away.
'board'+'games'='boardgames'
'boardgames' with 'das' taken out is 'borgame'.
'borgame' is an anagram of 'EMBARGO'.
(Other definitions for embargo that I've seen before include "Prohibit" , "Official order forbidding something" , "Ban, veto" , "Official prohibition as on trade" , "Proscribe, ban" .)