Room to manoeuvre (6)
I believe the answer is:
leeway
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">room to manoeuvre</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 leeway that I've seen before include "Limited room for manoeuvre" , "Space for free movement" , "Slack" , "play" , "Room for movement within limits" .)