Good trick when trapping old game bird (6)
I believe the answer is:
grouse
'game bird' is the definition.
(I know that grouse is a type of game bird)
'good trick when trapping old' is the wordplay.
'good' becomes 'g' (abbreviation).
'trick when' becomes 'ruse' (I've seen this before. I am not sure about the 'when' bit.).
'trapping' indicates putting letters inside.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'ruse' placed around 'o' is 'rouse'.
'g'+'rouse'='GROUSE'
Can you help me to learn more?
(Other definitions for grouse that I've seen before include "Plump game bird" , "Gripe; game bird" , "Game bird - beef" , "Bird - complaint" , "See game bird" .)