Wife ignoring important figure (6)
I believe the answer is:
eighty
'figure' is the definition.
(I've seen this before)
'wife ignoring important' is the wordplay.
'wife' becomes 'w' (abbreviation).
'ignoring' indicates named letters should be taken away.
'important' becomes 'weighty' (weighty can mean influential or important).
'weighty' with 'w' taken away is 'EIGHTY'.
(Other definitions for eighty that I've seen before include "not many score" , "XXC" , "LXXX" , "Fourscore" , "Cardinal" .)