Shout about half an hour for something to eat (5)
I believe the answer is:
curry
'something to eat' is the definition.
(curry is a kind of food)
'shout about half an hour' is the wordplay.
'shout' becomes 'cry' ('cry' can be a synonym of 'shout').
'about' is an insertion indicator.
'half an hour' becomes 'ur'.
'cry' placed around 'ur' is 'CURRY'.
'for' is the link.
(Other definitions for curry that I've seen before include "This powder is a mixture of spices" , "Dress leather" , "Highly spiced dish" , "Korma, for example" , "Scratch" .)