Unpredictable (7)
I believe the answer is:
erratic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unpredictable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for erratic that I've seen before include "Irregular, capricious" , "Irregular or uneven in movement or habits" , "Sporadic" , "Irregular and unpredictable" , "Deep affection" .)