Widen, as your pupils (6)
I believe the answer is:
dilate
(Other definitions for dilate that I've seen before include "Widen like eye pupils" , "Make (something) wider or more open" , "Widen, distend" , "Widen as eyes may" , "contract? No" .)
I believe the answer is:
dilate
(Other definitions for dilate that I've seen before include "Widen like eye pupils" , "Make (something) wider or more open" , "Widen, distend" , "Widen as eyes may" , "contract? No" .)