Having few worries about a judge appearing heartless (8)
I believe the answer is:
carefree
'having few worries' is the definition.
(without a care in the world)
'about a judge appearing heartless' is the wordplay.
'about' becomes 'ca' (short for circa).
'a judge' becomes 'referee' (referee is a kind of judge).
'appearing heartless' means to remove the middle letters (the heart of the word is removed).
'referee' with its centre taken out is 'refree'.
'ca'+'refree'='CAREFREE'
(Other definitions for carefree that I've seen before include "Without responsibility or anxiety" , "Free of trouble and worry" , "Happy and blithe - no worries" , "Unconstrained" , "Untroubled" .)