To hunger (6)
I believe the answer is:
starve
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">to hunger</span>' is the definition.<br/ ><span class="explanation-format__explanation">('starve' can be a synonym of 'hunger')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for starve that I've seen before include "Suffer great hunger" , "Deprive of food" , "Go hungry" , "Suffer extreme hunger" , "Suffer from lack of food" .)