Take flight (3,4)
I believe the answer is:
run away
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">take flight</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for run away that I've seen before include "Take to one's heels" , "Absconder" , "Escapee from custody - on the trot" , "Flee" , "One who has taken flight" .)