Placed in centre pile: 'Psychological Recurring Attacks' (8)
I believe the answer is:
epilepsy
'recurring attacks' is the definition.
(condition causing recurring fits)
'placed in centre pile psychological' is the wordplay.
'placed in' indicates a hidden word.
'EPILEPSY' is hidden in the letters of 'centre pile psychological'.
(Other definitions for epilepsy that I've seen before include "Nervous disorder causing fits or convulsions" , "Nervous disorder causing fits, as to Julius Caesar" , "complaint" , "Neurological disorder" , "Disorder marked by convulsions" .)