Wife, as a consequence, is from where? (6)
I believe the answer is:
whence
'is from where?' is the definition.
(I've seen this before)
'wife as a consequence' is the wordplay.
'wife' becomes 'w' (abbreviation).
'as a consequence' becomes 'hence' (I've seen this in another clue).
'w'+'hence'='WHENCE'
(Other definitions for whence that I've seen before include "Wherefrom" , "From which place" .)