Engineer in corner supporting wife (6)
I believe the answer is:
wangle
'engineer' is the definition.
(I've seen this before)
'corner supporting wife' is the wordplay.
'corner' becomes 'angle' (I've seen this before).
'supporting' means one lot of letters go next to another (in a down clue, some letters go below others).
'wife' becomes 'w'.
'angle' put after 'w' is 'WANGLE'.
'in' is the link.
(Other definitions for wangle that I've seen before include "Finagle" , "Contrive to get for oneself" , "Deviously obtain" , "Obtain by being persuasive" , "Get by crafty means" .)