Teach new skills (7)
I believe the answer is:
retrain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">teach new skills</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for retrain that I've seen before include "Prepare for new job" , "Teach skills for a new job" , "Be taught new skills" , "Acquire new skills" , "Study for new job" .)