Fit to sail (9)
I believe the answer is:
seaworthy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fit to sail</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for seaworthy that I've seen before include "Safe to sail in" , "(Of ship) fit to set sail" , "Able to endure stormy weather" , "In a fit state for ocean voyage" .)