Male goose in butcher's (6)
I believe the answer is:
gander
This could be a double definition.
'male goose' is the first definition.
(I've seen this before)
'in butcher's' is the second definition.
'gander' can be an answer for 'butcher's' (both are slang terms for a look or glance). I am unsure of the 'in' bit.
Can you help me to learn more?
(Other definitions for gander that I've seen before include "He has webbed feet" , "Butchers - goose" , "waterbird" , "male member of the Anatidae family" , "Male 7 across" .)