Ignoring advice on a reorganisation (9)
I believe the answer is:
avoidance
'ignoring' is the definition.
(ignoring or avoiding something)
'advice on a reorganisation' is the wordplay.
'reorganisation' indicates anagramming the letters.
'advice'+'on'+'a'='adviceona'
'adviceona' with letters rearranged gives 'AVOIDANCE'.
(Other definitions for avoidance that I've seen before include "Steering clear of" , "Not dealing with" , "The shunning of something undesirable, like tax" , "Evasion" , "Dodging" .)