Complaint about parking left anger (9)
I believe the answer is:
displease
'anger' is the definition.
(I've seen this before)
'complaint about parking left' is the wordplay.
'complaint' becomes 'disease' (I've seen this before**).
'about' indicates putting letters inside.
'parking' becomes 'p'.
'left' becomes 'l' (common abbreviation).
'p'+'l'='pl'
'disease' going around 'pl' is 'DISPLEASE'.
(Other definitions for displease that I've seen before include "Upset" , "Aggravate" , "Anger" , "Nettle" , "Vex" .)