Cries about nothing and wife colours (7)
I believe the answer is:
yellows
'colours' is the definition.
(yellowing is a kind of colouring)
'cries about nothing and wife' is the wordplay.
'cries' becomes 'yells' ('yell' can be a synonym of 'cry'**).
'about' indicates putting letters inside.
'nothing' becomes 'o' (looks like zero - 0).
'and' says to put letters next to each other.
'wife' becomes 'w'.
'o'+'w'='ow'
'yells' going around 'ow' is 'YELLOWS'.
(Other definitions for yellows that I've seen before include "shows age" , "Turns lurid, perhaps" , "as broadsheet influenced by The Sun does?" , "Plant disease" , "shades of autumn?" .)