Adequate space to manoeuvre (9)
(Other definitions for elbow room that I've seen before include "sufficient space" , "play" , "Freedom to move" , "adequate working area" , "find adequate space to work in" .)
(Other definitions for elbowroom that I've seen before include "Enough space to work or move in - flex arm" , "Space to function" , "Lower boom to make working space" , "Bowl Romeo out to get some space" , "Adequate work space" .)