Be jealous of (4)
I believe the answer is:
envy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">be jealous of</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 envy that I've seen before include "Wish for thing or quality belonging to another" , "Bad feeling" , "One of 7 vices" , "Resentful feeling" , "Jealous longing" .)