Stroke a gander (6)
I believe the answer is:
glance
This clue is a double definition.
'stroke' is the first definition.
(I've seen this before)
'a gander' is the second definition.
(thesaurus)
(Other definitions for glance that I've seen before include "oblique movement" , "Give a quick look" , "Look quickly at -- cricket stroke" , "black shiny stuff" , "Skim" .)