Run down, father. Edgar is in trouble outside (9)
I believe the answer is:
disparage
'run down' is the definition.
(I've seen this before)
'father edgar is in trouble outside' is the wordplay.
'father' becomes 'pa' (pa is a kind of father).
'in trouble' is an anagram indicator.
'outside' indicates putting letters inside.
'edgar'+'is'='edgaris'
'edgaris' anagrammed gives 'disrage'.
'pa' inserted inside 'disrage' is 'DISPARAGE'.
(Other definitions for disparage that I've seen before include "Run down" , "I grasped a change to belittle" , "Slight" , "Belittled" , "Scorn" .)