Spooner puts Shah on notice. Such cheek! (8)
I believe the answer is:
chutzpah
'cheek' is the definition.
(chutzpah is a kind of cheek)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for chutzpah that I've seen before include "Impertinence" , "Self-assurance bordering on audacity" , "Slang for shameless cheek or impudence" , "Unbelievable gall; impudence (Yiddish)" , "Unbelievable audacity (from Yiddish)" .)