Tense, on edge (7)
I believe the answer is:
uptight
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">tense</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">on edge</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for uptight that I've seen before include "Tense, nervous, repressed" , "Tensely repressed" , "Tip thug, being nervous and tense" , "Tense or angry" , "Unable to express one's feelings" .)