Conventional (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conventional</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for formal that I've seen before include "Stiff - proper" , "Regular" , "Punctilious" , "Ceremonial; ordered" , "Suitable for a ceremonial occasion" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conventional</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for orthodox that I've seen before include "Standard" , "not Independent-minded?" , "Conforming with tradition" , "Conservative" , "By the book" .)