Blue poet swaps love for anger (8)
I believe the answer is:
sapphire
'blue' is the definition.
(I know that sapphire is a type of blue)
'poet swaps love for anger' is the wordplay.
I cannot really understand how this works, but
'anger' could be 'ire' (ire is intense rage) and 'ire' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sapphire that I've seen before include "Deep blue colour" , "Deep blue - precious stone" , "Corundum gemstone" , "His paper can be made into a jewel" , "sparkler" .)