Plague overtakes woman: one likely to wail (7)
I believe the answer is:
banshee
'one likely to wail' is the definition.
'plague overtakes woman' is the wordplay.
'plague' becomes 'bane' (I've seen this in another clue).
'overtakes' is an insertion indicator.
'woman' becomes 'she'.
'bane' placed around 'she' is 'BANSHEE'.
(Other definitions for banshee that I've seen before include "She predicts death in Ireland" , "Wailing female spirit" , "Wailing woman from Gaelic myth" , "no one wishes to hear" , "Wailing woman of Irish legend" .)