Indicate indifference (5)
I believe the answer is:
shrug
'indicate indifference' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for shrug that I've seen before include "So-what gesture" , "Gesture of uncertainty or not knowing" , "display nonchalance" , "Body language indicating indifference or resignation" , "____ off, dismiss" .)