Focused on one aim, ignoring everything else, until venison is cooked (6,6)
I believe the answer is:
tunnel vision
'focused on one aim ignoring everything else' is the definition.
I can't tell whether this defines the answer.
'until venison is cooked' is the wordplay.
'is cooked' indicates anagramming the letters (letters cooked into a new form).
'until'+'venison'='untilvenison'
'untilvenison' with letters rearranged gives 'TUNNEL VISION'.
Can you help me to learn more?
(Other definitions for tunnel vision that I've seen before include "dream Napoleon had for invading England?" , "unwavering concentration? - with 4a" , "Seeing problem" , "Inability to take a wider view" , "Condition where one can only see objects directly ahead" .)