Simple conclusions of the data banks study (4)
I believe the answer is:
easy
'simple' is the definition.
(associated in meaning)
'conclusions of the data banks study' is the wordplay.
'conclusions of' indicates one should take the final letters.
'banks' means to remove the middle letters (I've seen 'banks of' mean this (the banks are the sides of the word)).
'study' with its centre removed is 'sy'.
The last letters of 'the data' are 'ea'.
'ea'+'sy'='EASY'
(Other definitions for easy that I've seen before include "Simple - not fussy" , "Not rocket science" , "Comfortable" , "Simple or uncomplicated" , "Men may be told to stand thus" .)