Wife loathing extremely short, dismissive remark (8)
I believe the answer is:
whatever
'dismissive remark' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'wife loathing extremely short' is the wordplay.
'wife' becomes 'w' (abbreviation).
'loathing' becomes 'hate' (loathing is hatred).
'extremely short' becomes 'ver' (I've seen this in other clues).
'w'+'hate'+'ver'='WHATEVER'
Can you help me to learn more?
(Other definitions for whatever that I've seen before include "The waver? (anag)" , "Anything; at all" , "Off the wall" , "Of any kind at all" .)