Accused fan tended to run (9)
I believe the answer is:
defendant
'accused' is the definition.
(I know that accused can be written as defendant)
'fan tended to run' is the wordplay.
'to run' is an anagram indicator.
'fan'+'tended'='fantended'
'fantended' is an anagram of 'DEFENDANT'.
(Other definitions for defendant that I've seen before include "Against whom an action is brought in a law court" , "One charged" , "The one before the court" , "Person accused" .)