Spiritless court coming to a bad end (6)
I believe the answer is:
wooden
'spiritless' is the definition.
(thesaurus)
'court coming to a bad end' is the wordplay.
'court' becomes 'woo' (both can mean to romance someone).
'coming to' means one lot of letters go next to another.
'a bad' indicates an anagram.
'end' with letters rearranged gives 'den'.
'woo'+'den'='WOODEN'
(Other definitions for wooden that I've seen before include "Stiff in manner, showing no expression" , "Expressionless and dull, like timber" , "Stiff, awkward" , "Stilted; made from tree" , "Emotionless" .)