Gay bishop set on fire by male (6)
I believe the answer is:
blithe
'gay' is the definition.
(thesaurus)
'bishop set on fire by male' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'set on fire' becomes 'lit' (I've seen this before).
'by' is a charade indicator (letters next to each other).
'male' becomes 'he'.
'b'+'lit'+'he'='BLITHE'
(Other definitions for blithe that I've seen before include "Merry" , "Happy, without worries or cares" , "Happy, joyous" , "Heedless" , "Light-hearted and good-humoured" .)