Cook gave nothing for the tars to get upset about (5)
I believe the answer is:
roast
'cook' is the definition.
(I know that roast is a more specific form of cook)
'nothing for the tars to get upset about' is the wordplay.
'nothing for' becomes 'o' (I can't justify this - if you can you should give a lot more credence to this answer).
'to get upset' indicates an anagram (I've seen 'getting upset' mean this).
'about' indicates putting letters inside.
'tars' anagrammed gives 'rast'.
'o' going inside 'rast' is 'ROAST'.
'gave' is the link.
Can you help me to learn more?
(Other definitions for roast that I've seen before include "Grill" , "Berate - cook" , "Cook in oven or by exposure to heat" , "Be uncomfortably hot" , "Cooked joint" .)