Sickened (9)
(Other definitions for ailed that I've seen before include "Was unwell" , "was on the blink?" , "Was ill" , "Felt bad" , "was giving trouble" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sickened</span>' is the definition.<br/ ><span class="explanation-format__explanation">('nauseate' can be a synonym of 'sicken')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nauseated that I've seen before include "Disgusted" , "Sickened" , "Revolted" .)