Melanie displays such style! (4)
I believe the answer is:
elan
'style' is the definition.
(I know that style can be written as elan)
'melanie displays' is the wordplay.
'displays' indicates a hidden word.
'ELAN' can be found hidden inside 'melanie'.
'such' is the link.
(Other definitions for elan that I've seen before include "Flamboyance" , "Vivacity, dash" , "Grass with edible grains" , "Stylish elegance" , "Stylishness" .)