Married woman shows spite (6)
I believe the answer is:
malice
'spite' is the definition.
(I know that spite can be written as malice)
'married woman' is the wordplay.
I cannot really see how this works, but
'married' could be 'm' (abbreviation, e.g. in genealogy) and 'm' is found within the answer.
'woman' could be 'alice' and 'alice' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'shows' is the link.
Can you help me to learn more?
(Other definitions for malice that I've seen before include "Desire to harm others, may be aforethought" , "Spiteful, animosity, sometimes a forethought" , "evil intent" , "Wrongful intention" , "'Ill-will, spite (6)'" .)