Little in surprisingly bad scoreline (14)
I believe the answer is:
inconsiderable
'little' is the definition.
(thesaurus)
'in surprisingly bad scoreline' is the wordplay.
'surprisingly' indicates anagramming the letters.
'bad'+'scoreline'='badscoreline'
'badscoreline' with letters rearranged gives 'considerable'.
'in'+'considerable'='INCONSIDERABLE'
(Other definitions for inconsiderable that I've seen before include "Unimportant, insignificant" , "petty" , "'minute'" .)