Hearty eater cut short by that woman's husband (11)
I believe the answer is:
'hearty eater cut short by that' is the definition.
'trencherman' can be an answer for 'hearty eater' (I've seen this before). I am not sure about the rest of the definition.
'woman's husband' is the wordplay.
'woman' becomes 'trencher' (I can't justify this - if you can you should believe this answer much more).
'husband' becomes 'man' (a married man).
Can you help me to learn more?
(Other definitions for trencherman that I've seen before include "one enthusiastically taking courses" , "hearty eater" .)