Polaris (5,4)
I believe the answer is:
north star
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">polaris</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for north star that I've seen before include "navigational guide" , "feature of Ursa Minor" , "Polaris" , "nickname of US State" , "guiding light" .)