Course of action (4)
I believe the answer is:
tack
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">course of action</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 tack that I've seen before include "pin" , "Ship's course; horse's harness" , "(Of a sailing ship) alter course through the wind" , "Drawing-pin" , "Nail - windward course - temporary stitch" .)