Childish anger follows regular helpings of prunes (7)
I believe the answer is:
puerile
'childish' is the definition.
(I've seen this in another clue)
'anger follows regular helpings of prunes' is the wordplay.
I cannot quite understand how this works, but
'anger' could be 'rile' (I've seen this before) and 'rile' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for puerile that I've seen before include "Childishly silly" , "Childishly stupid" , "Infantile" , "Childish, immature" , "Babyish" .)