Balance sheet item (5)
'balance sheet item' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for asset that I've seen before include "Anything of value" , "- - -stripper" , "Item conferring advantage" , "A possession of some value" , "valuable sort" .)
(Other definitions for equity that I've seen before include "Even-handedness" , "Fairness, impartial treatment" , "Moral justice for the actor's union" , "Group of performers" , "Fair play - actors' union" .)