Girl has nothing in clink (4)
I believe the answer is:
gaol
'clink' is the definition.
(I know that clink can be written as gaol)
'girl has nothing' is the wordplay.
'girl' becomes 'gal' ().
'has' indicates putting letters inside.
'nothing' becomes 'O' (looks like zero - 0).
'gal' placed around 'o' is 'GAOL'.
'in' is the link.
(Other definitions for gaol that I've seen before include "The Ballad of Reading -- (Wilde)" , "Prison (British spelling)" , "Nick" , "stir" , "Alternative to jail" .)