Muddled; rotten (6)
I believe the answer is:
addled
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">muddled</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">rotten</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for addled that I've seen before include "Confused and vague" , "Perplexed -- rotten" , "became rotten" , "(Of an egg) went bad" , "Of egg, rotten and producing no chick" .)