Hat Maria fashioned for traitorous dancer (4,4)
I believe the answer is:
mata hari
'traitorous dancer' is the definition.
'mata hari' can be an answer for 'dancer' (I have seen 'exotic dancer' mean 'mata hari' so perhaps 'dancer' could also mean 'mata hari'). I am unsure of the 'traitorous' bit.
'hat maria fashioned' is the wordplay.
'fashioned' indicates an anagram.
'hat'+'maria'='hatmaria'
'hatmaria' is an anagram of 'MATA HARI'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for mata hari that I've seen before include "Seductive female spy" , "Dutch dancer and spy" , "Infamous dancer executed as a German spy" , "Famous female spy" , "Dutch dancer and secret agent, executed in 1917" .)