Disinclination to move (7)
I believe the answer is:
inertia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disinclination to move</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 inertia that I've seen before include "Listlessness" , "Tendency to inaction" , "Tendency to inactivity" , "Disinclination to respond" , "I retain (anag) - the tendency to retain same speed and direction" .)