Piece from Chanel, a name for style (4)
I believe the answer is:
elan
'for style' is the definition.
(synonyms)
'piece from chanel a name' is the wordplay.
'piece from' indicates the answer is hidden within the clue.
'ELAN' can be found hidden inside 'chanel a name'.
(Other definitions for elan that I've seen before include "Style and liveliness" , "Dash in France" , "Bounce" , "Vivacity, panache" , "Panache - ardour" .)