Ascribe; attribute (6)
I believe the answer is:
impute
This clue is a double definition.
'ascribe' is the first definition.
(I know that ascribe can be written as impute)
'attribute' is the second definition.
(I know that impute is a more specific form of the action attribute)
(Other definitions for impute that I've seen before include "Attribute (something bad) to someone" , "Attribute to a source or cause" , "Ascribe (something unpleasant)" , "Ascribe (crime etc) to someone" , "Uptime (anag.)" .)