What cat uses when hunting bird in south? (7)
I believe the answer is:
stealth
'what cat uses when hunting' is the definition.
I can't judge whether this defines the answer.
'bird in south?' is the wordplay.
'bird' becomes 'teal' (type of duck).
'in' indicates putting letters inside.
'south?' becomes 'sth' (abbreviation for south).
'teal' going within 'sth' is 'STEALTH'.
Can you help me to learn more?
(Other definitions for stealth that I've seen before include "Cats display this" , "Furtive behaviour" , "Kind of indirect tax" , "Halt set in furtive manner" , "Low-visibility military technology" .)