Girl: she's displaying cricket trophy (3,5)
I believe the answer is:
the ashes
'cricket trophy' is the definition.
(I've seen this before)
'girl she's' is the wordplay.
'girl' becomes 'thea' (**).
'thea'+'shes'='THE ASHES'
'displaying' is the link.
(Other definitions for the ashes that I've seen before include "Cricketing trophy" , "Trophy awarded in England-Australia cricket, sounds grubby" , "Trophy for winner of AngloAustralian cricket series" , "trees" .)