US police show cool in case of crisis (5)
I believe the answer is:
chips
'us police show' is the definition.
I can't judge whether this definition defines the answer.
'cool in case of crisis' is the wordplay.
'cool' becomes 'hip' (hip can mean cool or fashionable).
'in' means one lot of letters goes inside another.
'case of' says to hollow out the word (remove centre letters) (like emptying a case).
'crisis' with its middle removed is 'cs'.
'hip' inserted into 'cs' is 'CHIPS'.
Can you help me to learn more?
(Other definitions for chips that I've seen before include "Potato slices, good with fish" , "Flakes" , "Casino currency" , "Silicon computer components" , "Gaming counters" .)