Mean to fix handle (4)
I believe the answer is:
name
I believe this is a triple definition!
'mean' is the first definition.
(I know that name is a more specific form of the action mean)
'to fix' is the second definition.
(naming is a kind of fixing)
'handle' is the third definition.
(handle can mean a name or nickname)
(Other definitions for name that I've seen before include "Monicker" , "By which a person is known" , "Amen (anag)" , "Identification" , "Specify; famous person" .)