Bar nothing welcoming naughty nude suggestion (8)
I believe the answer is:
innuendo
'suggestion' is the definition.
(thesaurus)
'bar nothing welcoming naughty nude' is the wordplay.
'bar' becomes 'inn' (I've seen this before**).
'nothing' becomes 'o' (looks like zero - 0).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'naughty' indicates anagramming the letters.
'inn'+'o'='inno'
'nude' is an anagram of 'uend'.
'inno' enclosing 'uend' is 'INNUENDO'.
(Other definitions for innuendo that I've seen before include "Slur" , "suggested" , "Undone in unpleasant insinuation" , "Indirect reference to something rude" , "Indirect or subtle reference" .)