Gastric woe (5)
I believe the answer is:
ulcer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gastric woe</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ulcer that I've seen before include "Inflammatory and often suppurating lesion on the skin" , "cause of suffering" , "Cruel form of stomach trouble?" , "Stomach complaint" , "Cruel (anag.)" .)