Hilarious bishop is rising in anger (7)
I believe the answer is:
risible
'hilarious' is the definition.
(thesaurus)
'bishop is rising in anger' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'rising' shows that the letters should be reversed in order (going up in a down clue).
'in' indicates putting letters inside.
'anger' becomes 'rile' (I've seen this in other clues**).
'b'+'is'='bis'
'bis' written backwards gives 'sib'.
'sib' put inside 'rile' is 'RISIBLE'.
(Other definitions for risible that I've seen before include "Absurd" , "Causing laughter - beyond a joke" , "making one laugh" , "Funny - not even funny" , "A complete joke!" .)