Crest (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">crest</span>' is the definition.<br/ ><span class="explanation-format__explanation">(geographical term)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ridge that I've seen before include "Line where two upward sloping surfaces meet" , "watershed ..." , "there's a lot of pressure in it" , "German Baltic port, Buxtehude home" , "Top of sloping roof" .)
(Other definitions for apex that I've seen before include "reasonable fare" , "The highest point or peak" , "crown" , "The highest point or pointed end" , "climax" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">crest</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that comb is a type of crest)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for comb that I've seen before include "Tidy (hair); some honey" , "Implement with teeth" , "Fowl's crest" , "Carefully search" , "Search methodically" .)