Really wanting bishop to avoid making spiteful comments (7)
I believe the answer is:
itching
'really wanting' is the definition.
(eg itching for a fight)
'bishop to avoid making spiteful comments' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'to avoid' indicates named letters should be taken away.
'making spiteful comments' becomes 'bitching' (bitch can mean to make nasty comments).
'bitching' with 'b' removed is 'ITCHING'.
(Other definitions for itching that I've seen before include "Consumed with curiosity" , "Having teasing desire" , "It causes a desire to scratch" , "Yearning" , "causing irritation?" .)