Breaks suddenly (5)
I believe the answer is:
snaps
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">breaks suddenly</span>' is the definition.<br/ ><span class="explanation-format__explanation">('snap' can be a synonym of 'break suddenly')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for snaps that I've seen before include "Breaks under tension" , "shots" , "Spells of cold weather" , "Breaks suddenly" , "Photos" .)